Unable to open .pdf files in Adobe Acrobat Reader all of the sudden? You may receive the "Microsoft Visual C++ Runtime Library Runtime Error! Program: C:Program Files (x86)AdobeReader This application has requested the Runtime to terminate in an unusual way. Please contact the application's support team for more information." error message when attempting to open Adobe Acrobat PDF files. If removing and reinstalling the program does not solve the problem then the following solutions may work.
1. One of the easiest solutions is to go into the properties of the AcroRd32.exe executable by right clicking on the AcroRd32.exe executable and then selecting "Run this program in compatibility mode for: Windows XP (Service Pack 2)". You may also have to do this on the Acrobat.exe executable as well.
2. Another solution if the previous one doesn't work is to try right clicking the executable(s) again only this time select "Run as Administrator". Then proceed with the first set of instructions.
3. Finally editing the following registry key will hopefully fix your error. To accomplish this you go to "Start" select "Run" type in "Regedit" click on "Ok". Once in the registry editor navigate to the following location HKCU/Software/Microsoft/Windows/CurrentVersion/Explorer/UserShellFolders. On the right side of registry editor highlight "AppData". Double click "AppData" to edit its path. Change the path from %USERPROFILE%Application Data to %USERPROFILE%AppData.
HKCU/Software/Microsoft/Windows/CurrentVersion/Explorer/UserShellFolders AppData key value from %USERPROFILE%Application Data to %USERPROFILE%AppData