When trying to open document the following error message appears:

"The system cannot find the path specified."

Causes:

The error message described may occur because of some reasons:

1. An external drive was connected to the computer;
2. Windows username was changed;
3. Documents or other default user folder is not available (was removed or redirected);
4. Invalid Registry branches paths.

Solutions:

1. External drive:
   
   • Uninstall the program with the external drive connected using standard Windows methods: (Start > Control Panel > Programs > Programs and Features);
   • Delete the following folders if they still exist:
     C:\Program Files (x86)\ABBYY FineReader 15
     C:\Users\%userprofile%\AppData\Roaming\ABBYY\FineReader\15.00
     C:\ProgramData\ABBYY\FineReader\15.00;
     Please note that Program Data can be hidden.
     C:\temp\FR15
   • Disconnect the external drive
   • Download the distribution to a local drive. 
   • Launch the installation by double-click onto the downloaded file.
2. Windows username:
   • Open the Windows Environment Variables (go to Control Panel > System and Security > System > Advanced System Settings, click Environment Variables...,);
   • Check the TEMP and TMP variables values (it should contain your Windows username);
   • Correct the inconsistency between the values or try to change them to C:\Temp.
3. Documents (or other defaults user folders):
   • Open C:\Users\%username%;
   • Create Documents folder if it doesn't exist.
4. Registry branches:
   • Press Windows + R on a keyboard, enter Regedit, and launch registry editor as administrator.
   • In the registry editor find the registry branches:
     • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders;
     • HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders.
   • Make sure that the correct paths for all user folders are displayed in the registry branches.