If you are still having issues it maybe be related to the Revo Uninstaller programs you have. I looked up the program and noticed it had the ability to search out remnants of programs that do not uninstall correctly. The problem with removing files or registry entries related to an installed program is that the Windows OS uses many related files for itself. Also, by using Revo to remove registry entries, the program may remove entries related to active system or program files rendering them useless and then your system becomes unstable.
At this point, IF you are still having issues, the only thing I can recommend is to format and reinstall the OS.
Please post back and let me know if the computer is still having issues.