Adobe Acrobat does not open (two instances in task manager)

[John29468553ducd]

I have used the Aero cleaner program to fully remove both Reader and Acrobat. rebooted the computer then installed either and then tried to launch PDF file. 

If I have Acrobat or Reader open, the pdf opens as expected. If I set windows to use a different default program for pdf viewing, no issues. I only get this behavior, when I launch a pdf from the file. No error presented. Just two copies of the program are listed under Background Processes.

I have a .dmp file from taskmanager of the one of the programs hanging.

[John29468553ducd]

I will also add that local administrators do not have this issue, local computer users are primarly affected.

[John29468553ducd · Accepted solution]

It appears that protected mode was started. One solution would to have been to whitelist the %temp% directory from Adobe's protections. The other was to modify the SQL commands launching the pdfs.

Old command:

client_host('cmd /c start ' || v_filename);

New command:

webutil_host.nonblocking('cmd /c ' || vfilename);

[Rodog28906367xbmz]

Hi John,

I am having this issue in right now. Im a bit too computer basic to understand what your doing above with command lines. Can you help at all or explain any further? I have tried uninstalling and reinstalling acrobat and it hasnt fixed things.

Thanks in advance

[davehumphrys]

I have the exact issue, my PC did a windows update and now  Reader hangs for quite some minutes then the pop up says there are 2 instances running. I have un installed, reboted - a fresh install and it still does the same. - I have to use Gooogle to open these right now for work. - I do not understand the white listing shown here. - please show me how to do this fuction. Many thanks for you Help here.

[John29468553ducd]

In my case, I was opening a generated PDF from an SQL database; Acrobat didn't have the needed permissions to open the files that were created on the fly. I will also note that my issues were only related to the PDFs that I was opening from the SQL source. all other PDF files opened as expected.

[davehumphrys]

Thanks John, - So this is different, I apriate your input - all the best.

[davehumphrys]

Well, I used the Aero cleaner and it seems to have fixed the issue - Thanks John, - for any followers of this, here is the link to it on Adobe' website.

https://www.adobe.com/devnet-docs/acrobatetk/tools/Labs/cleaner.html

running this and re starting the PC twice then doing a clean install fixed the issue ( so far) - Thanks to all with this and i hope this adds further.

BR