Ankit_Jain  asked:"...are you facing this issue with this update onwards only or were you facing this with the earlier release"...?

This issue came with either version 10.1 or 10.1.2.

I have been unable to find a comprehensive version history for the Adobe Reader X but from http://kb2.adobe.com/cps/860/cpsid_86063.html and http://kb2.adobe.com/cps/901/cpsid_90161.html I have been able to piece together that Protected Mode was introduced with Version 10.0  and Protected View was introduced with 10.1. Many bug fixes for the Protected Mode issue (see http://kb2.adobe.com/cps/860/cpsid_86063.html) were introduced with 10.1. and 10.1.2.

To ABC123XYZ242526: Disabling the checkbox next to Enable Protected Mode sandbox does help but it is a very bad idea as this is an important security measure.

1) khwajakhurram I have tried your suggestion to uncheck the default "Enable hardware rendering for legacy video cards" setting and it seems to work!

What is surprising is that Adobe Reader X's 3D & Multimedia settings report that the alternative preferred renderer modes are either software or DirectX9 .....on a Vista machine with DirectX11.

The video card on this machine is definitely not legacy but a recent quality Nvidia produced card. That is also the case on the other machines with the issue I have reported.

2) http://kb2.adobe.com/cps/860/cpsid_86063.html mentions that "certain configurations of anti-virus software that have not yet white-listed AcroRd32.exe" are "Unsupported configurations for Reader running in Protected Mode". Therefore I have also excluded AcroRd32.exe from virus scanning.

I am now able to use both Protected Mode and Advanced Security without issue.

I will experiment with various versions of this in the next few days and see whether both or just one of these remedies are needed.

Update: I have found that performance is vastly improved by changing from the default preferred renderer mode of DirectX9 to the alternative Software setting. 

cophagenmail, I agree, but waiting 10 to 20 seconds each time I open a pdf is unreasonable and unacceptable. Incidentally, I have not figured our how to get these settings to stay because each time I reboot my system or restart Adobe, the settings get restored and I must reset them. Do you know how to make the settings stick?

I still have this problem despite all of the comments made here and my own efforts to fix it. Adobe needs to address this issue or I must uninstall the X version and use a version that works such as version 9 or none. I cannot afford the time loss.

I have the exact same problem as the original post.  I'm using Windows 7 64-bit.  I have removed version 10.1.2 and put version 9.5 back on and that has sorted the problem.

Not ideal but I too don't have time to mess about with it.

One thing to add, don't know if its relevant but I have reader installed on a Sold State drive. (as before It was on a normal sata2 platter drive working without issue)

Cheers

Clearing the Enable hardware rendering for legacy video cards did NOT resolve the problem.  It's a race against time.  Start Adobe Reader X and everything works fine for about 5 seconds,  then it hangs.

I am NOT happy about this.

I am away April 27 through April 30, back May 1.

I am also using SSD drive for OS and Programs.  Data is on hard drive.

Removing support for legacy video hardware did not fix it.

AnHoBe suggestion did not seem applicable--<user>\AppData\Local\Adobe\Acrobat\10.0 was not empty.

Go to the Acrobat Plug_ins folder and remove all the .api files (cut and paste them elsewhere). One of these preload api's is causing the hangup.

You can put the api files back one at a time if you want to identify the culprit

C:\Program Files (x86)\Adobe\Acrobat 10.0\Acrobat\plug_ins

Path could be different on your PC depending on OS and Acrobat version

Not sure which exact one's it would be in your case, but try removing the following

Acroform.api

Updater.api

Annots.api

DigSig.api

Escript.api

PKKLite.api

If everything starts working, you can put these back one by one to find the one which causes adobe to hang

I am running Adobe Reader X version 10.1.4 under Windows 7 x64, and experiencing exactly the same problems as described in this thread.

I have worked through the various fixes until here - and this is the one that appears to have fixed it in my case.   We'll see........

Whatever the problem is, it doesn't look like Adobe has sorted it yet.

Richard

Running windows 7 x64 with Reader X 10.1.4 and experience the "not responding" situation described here:

- open a pdf file, it works for a few seconds (ie you can page down)

- then reader hangs for 10-20 seconds, windows says app is not responding

- then reader comes back

Notes: this seem to happen once per PDF file, ie repeated opening doesn't trigger this. The "not responding" is not happening all the time (or maybe not for each PDF).

All the suggestions here didn't work for me, happens with Software as renderer and with protected mode disabled or enabled.

====> I'd really appreciate help from Adobe to look into this and fix the issue!

Same issue here. Latest version of Adobe Reader, latest windows updates (Win 7 Home Premium 64-bit). Adobe reader says "Not repsonding" for about 10-15 seconds every time I open a document. Reinstalling it doesn't change the situation.

This is a monumental problem.  It occurs on 2 Windows 7 computers.  It has been happening for months on both of them.  I tried all of the fixes and nothing worked.

I upgraded both computers to Windows 8, clean install.    For first day and a half, all was good, but now it's happening again.  One system is a 64 bit desktop, the other is a 32 bit taptop.

I cringe whenever anyone sends me a pdf.  Is this what Adobe wants?

Someone should contact Adobe Support, since they're obviously not reading their own forum.

I am sad to report that I still have this problem with Acrobat  on more than one computer and operating system.

I am running a Lenovo T61 with XP pro 32 bit with Acrobat 8.  For years Acrobat 8 ran flawlessly.  Then suddenly several months ago it began having the same problem as described above.  Why now.  I thought perhaps I had corrupted the Adobe installation somehow so I ran a repair, (no good), followed by an uninstall & reinstall, (no good), followed by an uninstall and upgrade to Acrobat 9, still no success.   Then I read forum after forum related to Acrobat and this issue with no success.  Out of frustration I took a very closed look at how and when the problem occurred.  It turns out that the unresponsive behavior always followed an updating of the display.  Sometimes even the smallest screen change triggered the problem.  A quick check of forums associated with my video module pointed the root cause directly at the video module,  the primary complaint being the video module substantially slowed or stopped altogether, causing applications to hang.  This can be seen, at least in my case, where prior to Adobe going unresponsive the display acted erratic.  The proposed fix called for updating the display drivers.   After updating my display driver from v2.14 to v6.14 the problem disappeared altogether.  I have tested every possible condition for the past several days and have not had a reoccurrence of the problem.

I'm trying to work out how to install and run this tool properly.

I am having the same  Acrobat is unresponsive problem with 32bit Windows Vista and Acrobat 11.0.2  dated 2/15/2013.   So far I have renamed the plug-in directories.   Acrobat becomes unresponsive as soon as I click General  in Edit/preferences,   or click

3d-Multimedia  this is just opening Adobe/Reader11.0/Reader/AcroRd32/.   The latter only does a partial display of the 3d-multimedia choices.    Network detection on or off has no effect.  Nice time of the year to not even be able to read the irs.gov tax forms.

I installed 11.0.2 because 10.1.6 was not working.   11.0.2  worked for some simple pdf files from the net.

Now I read that 11.0.2 only supports XP with SP 3,  or Windows 7 or 8. 

Back to where 11.0.2 hangs on the net for simple files,  time to deinstall..

Google Chrome wants 11.0.2  so now adobe crashes.whether or not edit preferences 3d is software and not direct x9,  

Going to chrome://plugins   and disable Chrome PDF viewer and can now read internet PDF files.   ( Note on March 24,  chrome user advice was to "enable"  chrome PDF viewer.

Reading disk PDF files also works,  although there is about a 20 second delay,  perhaps as discussed earlier on this thread.

Even after closing all PDF files in chrome and from desktop,  task manager indicates 5 acrord32.exe  are running.

I have been encountering Problem years use of Adobe Reader and I got fed up last week and used Sysinternals to debug the process.  It was very obvious what the problem was once I identified where it hung. Adobe Reader goes through each file in the recently used list and does a check on the file status. Of course if the network drive (e.g. F:\ or N:\ ) is not connected, then Reader hangs on the file status check till the network connection attempt times out. Adobe Readeer then does this for every file in the recently used file list, so the more files on a network drive you have in your recently used list, the longer Adobe Reader hangs.

I use TrueCrypt to create virtual encrypted drives too and the problem also occurred with pdf files in the recently used list that were located inside the virtual encrypted drives (e.g. Z:\ or X:\ )

This is obviously a bug, as there is no reason to do a state check on a file in a recently used file list.

But in the absence of a quick fix, there is an easy workaround. Simply reduce the number of files in "Edit->Preferences->Documents" item "Documents in the recently used list" down to 1. The 1 is always the current open file, so you effectively don't get any history any more. There is not much need of the history in Windows 7 as Windows stores the list of last opened files anyway. After that simple Adobe Reader has never hung with me again since.

If you open Adobe Reader without specifying a file, then it will still hang of course (as the last used file on the network drive is still in the list (but I usually double click on the pdfs and avoid this). I have enclosed a screenshot from the procmon where the hang takes place. The selected line is where it gets into trouble, attempting to open the location with full control attributes:

ate & Time:  17/05/2013 15:33:20

Event Class:  File System

Operation:  IRP_MJ_CREATE

Result: NAME NOT FOUND

Path: C:\Windows\CSC\v2.0.6\namespace\M

TID:  7860

Duration: 0.0000411

Desired Access: Read EA, Write EA, Read Attributes, Write Attributes, Delete, Read Control, Synchronize

Disposition:  Open

Options:  Synchronous IO Non-Alert

Attributes: n/a

ShareMode:  Read, Write, Delete

AllocationSize: n/a

In case you need to reproduce, you can always use Truecrypt:

1. Create Truecrypt archive on local file system and mount and format the volume.
2. Put pdf file into the archive and open pdf with Adobe Reader.

3. Close Adobe Reader and unmount Truecrypt archive.

4. Restart Adobe Reader

5. Bang!