After installing the May updates on Windows 7, explorer.exe will not start. I successfully performed a restore and found that the culprit was KB2659262. All other updates are installed and the reboot has occurred. When I install the aforementioned update, explorer.exe will not start at all, whether in normal mode or safe mode.
The error states:
explorer.exe - application error
The application was unable to start correctly (0xc0000022). Click OK to close the application.
When I click OK, i just have a black screen. I can get the task manager going by hitting control, alt, delete. I've tried to start explorer.exe from the file menu, but get the same error.