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Adobe reader changing itself to 64bit when we need 32bit for the preview handler in outlook.

Community Beginner ,
Sep 20, 2021 Sep 20, 2021

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Due to other software 32bit office is a necessity.
Adobe seem to think if you manually install 32bit office that means you want it to automatically change to 32bit 5 mins later.

Anybody know how to stop this since it breaks compatability with 32bit apps.

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Download and install , General troubleshooting

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correct answers 2 Correct answers

Adobe Employee , Sep 24, 2021 Sep 24, 2021

Hi,

Steps to revert to 32-bit Reader are as follows

1. Uninstall 64-bit Reader installed on the machine.

2. Restart the machine (optional step)

3. Create the key to block the upgrade

  • [HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown]
    "bUpdateToSingleApp"=dword:00000000
    [HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown]
    "bUpdateToSingleApp"=dword:00000000

4. Install 32-bit Reader from https://get.adobe.com/reader/otherversions/ 

...

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Community Beginner , Oct 14, 2021 Oct 14, 2021

Looks like the PDF preview at least has been fixed in the latest update.

If you just need the pdf preview on 32bit outlook the new update will fix this even though it's 64 bit.
If you need it for other things I'm not sure if this will hlep or not.

https://www.adobe.com/devnet-docs/acrobatetk/tools/ReleaseNotesDC/continuous/dccontinuousoct2021.html#dccontinuousocttwentytwentyone

"Viewer

  • 4341634: PDF preview is not visible on 32bit outlook"

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Community Expert ,
Sep 12, 2021 Sep 12, 2021

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What's the problem with 64 Bit? What has your Office 365 to to with Acrobat Reader?

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Explorer ,
Sep 12, 2021 Sep 12, 2021

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Very Simple.

 

Acrobat reader installs a Preview Handler for Outlook for PDFs so you can view PDFs in outlook.

 

This ONLY works if Office and Actobat both have the same bits.  32 and 32 or 64 and 64.  If office if 32 bit - the most common, seeing that you have to go out of your way to install 64 bit - and Acrobat is 64, bit the PDF Preview Handler is not available.

 

So because on this machine I have a 32 bit office, I need the 32 bit Acrobat.  The problem is that when Acrobat does an update it automatically updates to the latest version that matches your machine architecture, NOT the one the matches your current version.

 

Therefore the PDF Preview handler gets broken and I am not happy.  The only solution is to deliberately install the 32 bit version, and then use a registry hack to prevent Acrobat from auto updating.  It works, but it isnt desireable given Adobe's track record of security holes in Acrobat etc.

 

Does that make sense?

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Community Expert ,
Sep 12, 2021 Sep 12, 2021

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Okay, do you use the Creative Cloud Desktop app to managing Adobes software and updates on your computer?  I do and got the latests version 2021.005.20060 in 32 bit. There have been no switch to 64 bit to me, so there might be something different to you. How are you upgrading in detail?

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Explorer ,
Sep 12, 2021 Sep 12, 2021

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No, no, this is just the free Acrobat Reader. I don't do anything to update, it just does it itself.

 

 

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Community Beginner ,
Sep 29, 2021 Sep 29, 2021

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Radzmar, you must have 32-bit Windows 10?  This incompatibility only occurs in 64-bit Windows 10, where the Adobe installer now installs 64-bit Reader by default.  If you have 32-bit Office then your Outlook PDF preview will be broken by this.  Hopefully Ankit's workaround below will solve the problem, although I am reluctant to try it since everything is fine for me now after disabling automatic updates.  

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New Here ,
Sep 22, 2021 Sep 22, 2021

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Hi DrBob,

 

I am experiencing the exact same issue.

Would you mind sharing the registry hack you are referring too?

 

Thanks.

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Explorer ,
Sep 22, 2021 Sep 22, 2021

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Sure.

 

See https://www.adobe.com/devnet-docs/acrobatetk/tools/PrefRef/Windows/Updater-Win.html?zoom_highlight=u... 

 

The second section, Mode.

 

In HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Adobe\Adobe ARM\Legacy\Reader\{AC76BA86-7AD7-1033-7B44-AC0F074E4100} 

 

and set mode to one of:

0: Do not download or install updates automatically.
1: Do not download or install updates automatically. Same as 0.
2: Automatically download updates but let the user choose when to install them.
3: Automatically download and install updates.
4: Notify the user downloads are available but do not download them.

 

I set mine to 0.

 

DrBob

 

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Adobe Employee ,
Sep 23, 2021 Sep 23, 2021

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Hi @morb!d  @DrBob 

I have DMed you a workaround to fix this problem of outlook preview not working with 64bit Acrobat. Can you please try that solution and let us know if that works?

Ankit,

Adobe Acrobat Software developer

 
 
 

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New Here ,
Sep 23, 2021 Sep 23, 2021

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Would you please message me the workaround too? 

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Adobe Employee ,
Sep 23, 2021 Sep 23, 2021

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@default5zpcveok22o6 @done, please let me know if that works?

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Community Beginner ,
Sep 26, 2021 Sep 26, 2021

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Can you please send that workaround to me too?
We have tons of issues with this at present.

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Adobe Employee ,
Sep 26, 2021 Sep 26, 2021

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If you are facing outlook pdf preview issue. Followings are the registry entried which needs to created:

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}]
"DisplayName"="@C:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\pdfprevhndlr.dll,-101"
"AppID"="{6d2b5079-2f0b-48dd-ab7f-97cec514d30b}"
@="Adobe PDF Preview Handler for Vista"
"DisableLowILProcessIsolation"=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\InprocServer32]
"ThreadingModel"="Apartment"
@="C:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\pdfprevhndlr.dll"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\ProgID]
@="PDFPrevHndlr.PDFPreviewHandler.1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\TypeLib]
@="{0F6D3808-7974-4B1A-94C2-3200767EACE8}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\VersionIndependentProgID]
@="PDFPrevHndlr.PDFPreviewHandler"

 

You can alternatively download the .reg file shared below and double click on it and registry entries would be automatically created.

https://documentcloud.adobe.com/link/track?uri=urn:aaid:scds:US:e94a84df-fa43-4b26-99bf-c1906c783c2b 

 

Please note that running .reg files changes the system configuration, so please ensure to verify the source and content of the file before running it on your system.

Thanks,

Ankit 

Adobe Acrobat software engineer

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Community Beginner ,
Oct 02, 2021 Oct 02, 2021

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This works.. 

Only solution on the internet that does

 

See attached .zip file that is renamed as .pdf. 

Rename to .zip after download - remove the .pdf off the end unpack and run the reg as supplied above 1 click fix. restart outlook

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Community Beginner ,
Oct 02, 2021 Oct 02, 2021

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.Since adobe will not let me attach

Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}]
"DisplayName"="@C:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\pdfprevhndlr.dll,-101"
"AppID"="{6d2b5079-2f0b-48dd-ab7f-97cec514d30b}"
@="Adobe PDF Preview Handler for Vista"
"DisableLowILProcessIsolation"=dword:00000000

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\InprocServer32]
"ThreadingModel"="Apartment"
@="C:\\Program Files\\Adobe\\Acrobat DC\\Acrobat\\pdfprevhndlr.dll"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\ProgID]
@="PDFPrevHndlr.PDFPreviewHandler.1"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\TypeLib]
@="{0F6D3808-7974-4B1A-94C2-3200767EACE8}"

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Classes\CLSID\{DC6EFB56-9CFA-464D-8880-44885D7DC193}\VersionIndependentProgID]
@="PDFPrevHndlr.PDFPreviewHandler"

 

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Explorer ,
Sep 26, 2021 Sep 26, 2021

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Hi @Ankit K Gupta (and @morb!d)

 

that registry patch worked just fine for me.

 

What is the history of this, and is it going to be integrated into Acrobat and Acrobat reader?

 

DrBob

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Adobe Employee ,
Sep 26, 2021 Sep 26, 2021

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Thanks for confirming @DrBob. Yes, this would be integrated with the next quarterly update of Acrobat/Reader and users won't have to run this file manually.  

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Explorer ,
Sep 26, 2021 Sep 26, 2021

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Oh, wonderful!!

 

DrBob

 

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Community Beginner ,
Oct 02, 2021 Oct 02, 2021

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@Ankit K Gupta why did adobe make this mess but... lots of love for the devs FAIL

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New Here ,
Oct 02, 2021 Oct 02, 2021

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The registry patch works fine for the preview component but does not resolve compatibilty with other applications (e.g. MYOB). Nor does it resolve the auto update issue.

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Community Beginner ,
Oct 13, 2021 Oct 13, 2021

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Agreed, this is a complete joke.

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New Here ,
Sep 23, 2021 Sep 23, 2021

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Hi,

 

We are seeing cases of adobe auto upgrading from 32 bit to 64 bit. We need to stop this as applications that hook into reader are not 64 bit.

I have tried the Registry key "Key:  bUpdateToSingleApp  , Value = 0 , type = dword

Location : HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDown" recommended on another post, this has NOT worked.

 

Please advise how we can stop this occuring as this is a Citrix environment this is happening which causes Adobe to not launch following your forced "upgrade".

Reader Version: 2021.007.20091.

 

Thanks,

Ryan

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Explorer ,
Oct 19, 2021 Oct 19, 2021

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Dear user, the fixes for this issue have been applied in the latest release so that Reader will not upgrade from 32 bit to 64 bit machines on Sever OS machines.

You can get the latest version of 32-bit Reader from:
https://get.adobe.com/reader/otherversions/

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Community Beginner ,
Nov 09, 2021 Nov 09, 2021

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Except thats wrong because it IS still happening!

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New Here ,
Nov 10, 2021 Nov 10, 2021

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First, download the 32-bit version of Adobe Acrobat DC Reader by first navigating to this site.

Download Adobe Acrobat Reader DC | Free PDF viewer | Windows, Mac, iOS, Android

Click on the ‘Do you have a different language or operating system’ link as highlighted below.

Choose the appropriate Operating System from the drop-down menu.

Choose ‘English’ as the language from the drop-down menu.

Select the 32-bit version of Adobe Acrobat DC Reader from the drop-down menu.

Unselect all the additional, bloatware options as shown below and then click on Download Acrobat Reader.

 

Log in to the server.

Uninstall Adobe Acrobat DC Reader (64-bit) from Add/Remove Programs.

Restart Server.

Use the 32-bit installer downloaded earlier to install on the server (ensure in RDS Install mode on Terminal Servers).

Once installed successfully, follow the next steps straight away.

Step 1. Disable Adobe Acrobat Update Task.

The first step to disable the Automatic Update in Adobe Reader is to disable the 'Adobe Acrobat Update Task' in Task Scheduler. To do that:

At the search box, type: task scheduler

Open Task scheduler

Click at Task Schedule Library at the left and then, at the right pane, right click at the Adobe Acrobat Update Task at select Disable.

Close Task Scheduler and continue to the next step.

Step 2. Disable Adobe Acrobat Update Service.

The next step is to disable the Acrobat Update service, by using one of the methods below:

Simultaneously press Windows R  keys to open run command box.

In run command box, type: services.msc and press Enter.

Double click to open "Adobe Acrobat Update Service" properties (AdobeARMservice).

Set the Startup type to Disabled.

Click OK and restart your computer.

Disable Adobe Reader DC Automatic Updates via Registry.Open Windows Registry Editor. To do that:Press the Windows + R keys to load the Run dialog box.

Type regedit and press Enter.

At the left pane, navigate to this key:

HKLM\SOFTWARE\Wow6432Node\Adobe\Adobe ARM\Legacy\(product name)\(product code)

e.g., HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Adobe\Adobe ARM\Legacy\Reader\{AC76BA86-7AD7-1033-7B44-AC0F074E4100}

 

At the right pane double click at Mode value* and at the Value Data box, change the value data from to 0 (zero).

Mode possible values:
0: Do not download or install updates automatically.
2: Automatically download updates but let the user choose when to install them.
3: Automatically download and install updates. (Default value)
4: Notify the user downloads are available but do not download them.

 

Close Registry Editor and restart your computer.

- From now on, Adobe Reader DC will not download and install updates automatically, but you can always install the new updates manually, by choosing the Check for Updates option in Adobe Reader's DC main menu. (Help > Check for Updates) *

* Note: If you want to remove the Check for Updates option, then follow the steps below.

Extra: Remove the "Check for Updates" option from Adobe Reader's menu.

Launch Registry Editor again and navigate to this key:

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\DC\FeatureLockDownRight click at an empty space on the right pane and select New > DWORD (32-bit) Value.

Name the new value: bUpdaterDouble click at the bUpdater value and set the Value Data to 0 (zero).

 

Close Registry Editor and Reboot your computer.

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New Here ,
Mar 30, 2022 Mar 30, 2022

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Still updates  automatically to 64bit......

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