I have a HP Notebook with the Windows7.  I located a corrupt uninstall file for my Epson printer.  I removed the corrupt file and everything was working fine for two days.  Now, it is back to not letting me open .ai files again.

 I have run disk utility to repair permissions, I did reset my Illustrator preferences, and I have uninstalled my printer (temporarily).  None of these suggestions have worked.

 1.  I get no error messages.  Illustrator opens but the file/files will not. 

2.  It happens with all my files.   Sometimes when I reboot and try again I can open the file.  All the other previous files I tried to open will open all at once with it as well.

3.  My files are local on my Notebook.

4.  I usually doube-click to open files.  I have tried both ways and niether work.