Yatharth, - I am posting this reply here as I tried to send it via E-Mail  (twice) and it was rejected as "address unknown" although this was the address I had used in my previous correspondence. I don't know what is going on at Adobe, but it doesn't certainly doesn't look good to its customers. It has now been 15 days since my last request to you on May 28th (see below), 25 days since I replied to your initial response on May 19th (see below), 26 days since your original response to me on May 18th (see below) and 4 weeks since my original posting on May 16th. I still cannot scan a document into Adobe Acrobat XI using the Acrobat software - and none of your suggestions have corrected this problem. Your lack of follow-up with further suggestions leads me to believe the following: 1. Adobe Technical support staff such as yourself are so overloaded with work solving technical problems with Adobe software, you lack the time to respond to all the outstanding problems. (I doubt this in correct.) 2. Adobe lacks the technical expertise to diagnose the problem and provide a solution. (I seriously doubt this is correct.) 3. Although this problem has been known for a number of years, in various releases of Acrobat, Adobe feels they have spent enough research time and money on the problem and chooses to simply ignore the customers who still have the problem. After all, they already have our money we paid to purchase the software. Maybe the owners with these problems will spend more hard-earned money and buy a newer version of Acrobat in the hope the problem will go away. (I'm beginning to suspect this is the case.) In any case, I would greatly appreciate a reply from you or one of your colleagues - hopefully with additional suggestions to correct the problem. Thank you. Peter Anderson (Tunaman) ________________________________________________________________________________________________________________________________________ Hi again, Yatharth, (Posted on May 28th) It has been a week and a half since I sent you my response below and I have not heard back from you. Could you please update me on the status of resolving my problem of not being able to scan from my User Account using Adobe Acrobat XI? Thank you. Peter Anderson (Tunaman) ________________________________________________________________________________________________________________________________________ Hi Yatharth, (Posted on May 19th) Thank you for your quick response. I have been unavailable for a few days so my response is somewhat delayed. I have tried all the suggestions you have made and I can report that the only solution that allows me to scan into Acrobat XI from my HP Officejet Pro 8629 AIO unit is to use another user account. I reported earlier that I could scan into Acrobat XI if I logged onto my computer using my wife's user account. I went further and created a new user account with Administrative privileges and was also successful with scanning. However, I found that there were differences in the scanning mode between these 2 accounts. In my wife's account, which was created about 6 months ago, the scanning mode was: "HP Officejet Pro 8620 TWAIN" with the Data Transfer Method = "Memory Mode" and the User Interface = "Hide Scanner's Native Interface" (but it was grayed out). In the new "Acrobat" account (with Administrative privileges) the scanning mode was: "WIA-HP Officejet Pro 8620 (NET)" with the Data Transfer Method = "Native Mode" and the User Interface = "Hide Scanner's Native Interface" (but it was grayed out). In both cases I could not change the mode nor the Data Transfer Interface. So these 2 user profiles were using 2 completely different interfaces, without the ability to switch the interface, but both scanning properly. In my original user profile I cannot select either of the "TWAIN" not the "WIA" option. Each time I try to select either option I get the: "Acrobat could not communicate with this device." error message. So, although I cannot understand why my wife's account and the new "Acrobat" account use different scanner interfaces, I do know that my user account is preventing Acrobat XI from accessing the HP 8620 scanner. So the question is: What is there in my user account, that Acrobat XI needs, that is preventing Acrobat to access my scanner? Acrobat can print to the HP 8620 device, but it can't find the scanner. I'm sure that within the Adobe Acrobat organization there are personnel who understand the coding and the "hooks" into the Windows 7 software which allow Acrobat to recognize the Windows 7-connected HP 8620 scanner. It appears that one of these "hooks" may be missing or corrupted. And the fact that everything was working just fine a few weeks ago leads me to suspect that possibly a change from a Microsoft Update may have led to my problem. However, in looking back through the Acrobat Forum for a number of years, I found that this is not the first time people have lost their scanner connection. It is also not unique to Acrobat XI. It has been a problem for users of Acrobat IX as well as Acrobat XI. Some users appear to have been successful in regaining the use of their scanners, but it appears that there are others who did not. So I have to assume that the Acrobat staff has done significant research into this problem that appears to be related to the "user interface" and, hopefully, they have an answer. Please provide my above listed experiences to the Acrobat staff with the hope that they have an answer to where the problem specifically lies and how to remedy my situation. After spending good money to purchase a quality product such as Adobe Acrobat XI, I should not have to create a new user account and switch to that account just to scan documents into the Acrobat software. I appreciate your assistance and look forward to your solution. Best regards, Peter Anderson (Tunaman44) On 5/18/2016 3:00 AM, Yatharth Vikram Singh wrote:  You have been mentioned by  Yatharth Vikram Singh in Re: Acrobat XI suddenly won't recognize my HP Officejet Pro 8620 scanner in Adobe Community - View Yatharth Vikram Singh's reference to you Hi Tunaman44,, Please check whether is there any update available for the software after going through "help > check for updates " Also Follow this thread to reset the preferences for the Acrobat software :- How to reset Preference settings in Acrobat. Please check after connecting the scanner locally to the device if its connected over any network. Please refer to this article :- Troubleshooting tips for scanner issues when using Acrobat If the issue still persist, then would request you to  please check with the different user account with Admin Rights to replicate the issue, for this please refer to this article :- Adobe troubleshooting: Using or creating an admin account in Windows 7, 8, Vista Let me know how it goes. Regards, Yatharth ... View more

Hi again, Yatharth, It has been a week and a half since I sent you my response below and I have not heard back from you. Could you please update me on the status of resolving my problem of not being able to scan from my User Account using Adobe Acrobat XI? Thank you. Peter Anderson (Tunaman) Hi Yatharth, Thank you for your quick response. I have been unavailable for a few days so my response is somewhat delayed. I have tried all the suggestions you have made and I can report that the only solution that allows me to scan into Acrobat XI from my HP Officejet Pro 8629 AIO unit is to use another user account. I reported earlier that I could scan into Acrobat XI if I logged onto my computer using my wife's user account. I went further and created a new user account with Administrative privileges and was also successful with scanning. However, I found that there were differences in the scanning mode between these 2 accounts. In my wife's account, which was created about 6 months ago, the scanning mode was: "HP Officejet Pro 8620 TWAIN" with the Data Transfer Method = "Memory Mode" and the User Interface = "Hide Scanner's Native Interface" (but it was grayed out). In the new "Acrobat" account (with Administrative privileges) the scanning mode was: "WIA-HP Officejet Pro 8620 (NET)" with the Data Transfer Method = "Native Mode" and the User Interface = "Hide Scanner's Native Interface" (but it was grayed out). In both cases I could not change the mode nor the Data Transfer Interface. So these 2 user profiles were using 2 completely different interfaces, without the ability to switch the interface, but both scanning properly. In my original user profile I cannot select either of the "TWAIN" not the "WIA" option. Each time I try to select either option I get the: "Acrobat could not communicate with this device." error message. So, although I cannot understand why my wife's account and the new "Acrobat" account use different scanner interfaces, I do know that _my user account_ is preventing Acrobat XI from accessing the HP 8620 scanner. So the question is: What is there in my user account, that Acrobat XI needs, that is preventing Acrobat to access my scanner? Acrobat can print to the HP 8620 device, but it can't find the scanner. I'm sure that within the Adobe Acrobat organization there are personnel who understand the coding and the "hooks" into the Windows 7 software which allow Acrobat to recognize the Windows 7-connected HP 8620 scanner. It appears that one of these "hooks" may be missing or corrupted. And the fact that everything was working just fine a few weeks ago leads me to suspect that possibly a change from a Microsoft Update may have led to my problem. However, in looking back through the Acrobat Forum for a number of years, I found that this is not the first time people have lost their scanner connection. It is also not unique to Acrobat XI. It has been a problem for users of Acrobat IX as well as Acrobat XI. Some users appear to have been successful in regaining the use of their scanners, but it appears that there are others who did not. So I have to assume that the Acrobat staff has done significant research into this problem that appears to be related to the "user interface" and, hopefully, they have an answer. Please provide my above listed experiences to the Acrobat staff with the hope that they have an answer to where the problem specifically lies and how to remedy my situation. After spending good money to purchase a quality product such as Adobe Acrobat XI, I should not have to create a new user account and switch to that account just to scan documents into the Acrobat software. I appreciate your assistance and look forward to your solution. Best regards, Peter Anderson (Tunaman44) ... View more

Hi Yatharth, Thank you for your quick response. I have been unavailable for a few days so my response is somewhat delayed. I have tried all the suggestions you have made and I can report that the only solution that allows me to scan into Acrobat XI from my HP Officejet Pro 8629 AIO unit is to use another user account. I reported earlier that I could scan into Acrobat XI if I logged onto my computer using my wife's user account. I went further and created a new user account with Administrative privileges and was also successful with scanning. However, I found that there were differences in the scanning mode between these 2 accounts. In my wife's account, which was created about 6 months ago, the scanning mode was: "HP Officejet Pro 8620 TWAIN" with the Data Transfer Method = "Memory Mode" and the User Interface = "Hide Scanner's Native Interface" (but it was grayed out). In the new "Acrobat" account (with Administrative privileges) the scanning mode was: "WIA-HP Officejet Pro 8620 (NET)" with the Data Transfer Method = "Native Mode" and the User Interface = "Hide Scanner's Native Interface" (but it was grayed out). In both cases I could not change the mode nor the Data Transfer Interface. So these 2 user profiles were using 2 completely different interfaces, without the ability to switch the interface, but both scanning properly. In my original user profile I cannot select either of the "TWAIN" not the "WIA" option. Each time I try to select either option I get the: "Acrobat could not communicate with this device." error message. So, although I cannot understand why my wife's account and the new "Acrobat" account use different scanner interfaces, I do know that _my user account_ is preventing Acrobat XI from accessing the HP 8620 scanner. So the question is: What is there in my user account, that Acrobat XI needs, that is preventing Acrobat to access my scanner? Acrobat can print to the HP 8620 device, but it can't find the scanner. I'm sure that within the Adobe Acrobat organization there are personnel who understand the coding and the "hooks" into the Windows 7 software which allow Acrobat to recognize the Windows 7-connected HP 8620 scanner. It appears that one of these "hooks" may be missing or corrupted. And the fact that everything was working just fine a few weeks ago leads me to suspect that possibly a change from a Microsoft Update may have led to my problem. However, in looking back through the Acrobat Forum for a number of years, I found that this is not the first time people have lost their scanner connection. It is also not unique to Acrobat XI. It has been a problem for users of Acrobat IX as well as Acrobat XI. Some users appear to have been successful in regaining the use of their scanners, but it appears that there are others who did not. So I have to assume that the Acrobat staff has done significant research into this problem that appears to be related to the "user interface" and, hopefully, they have an answer. Please provide my above listed experiences to the Acrobat staff with the hope that they have an answer to where the problem specifically lies and how to remedy my situation. After spending good money to purchase a quality product such as Adobe Acrobat XI, I should not have to create a new user account and switch to that account just to scan documents into the Acrobat software. I appreciate your assistance and look forward to your solution. Best regards, Peter Anderson (Tunaman44) ... View more