1st
Do Option 2 of this tutorial
SFC /SCANNOW Command - System File Checker it will not harm any data or programs you have installed it will try to find and repair any corrupt system files that you have.
2nd
Click on
start button in the search box type
Aero and look for
Find and fix problems with transparency and check for problems.

3rd
Click on the
Start Button type in
Services In the search box and then click on Services
Scroll down until you see
Desktop Windows Manager Sessions Manager select it in click on the
Stop text and let it stop after that click on
Start text and see if that works. Your screen may blink when you do this.

Jerry
PS don't use tuneup utilities again