Windows 7: Explorer.exe keep crashing

Hello I have had this problem now for a week where my explorer.exe randomly crashes without any error or warning mostly when I play (older) games in fullscreen specially when I use alt+f4 I downloaded a program called WinCrashReport and uploaded the report to here
In short the exception code was 0x000006D9 and address 0x7748F636 googled some and found a dude with similar problmes which used SFC /Scannow to fix it, I tried that but said it couldn't repair all then I tried SFC /scanfile=C:\Windows\explorer.exe but it said "Windows Resource Protection did not find any integrity violesions." I don't really understand this but I guess that means the file is fine and problem is else where?

Computer Specs:
- Windows 7 Ultimate 32 bit Full retail
- Intel Core i5-450M
- ATI Mobility Radeon HD 5870
- Two 2GB RAM sticks (4GBs in total)
- 260GB IDE HDD

Hello Kalle

You may need to run SFC /SCANNOW up to three times with reboots between for it to be able to repair those files - SFC /SCANNOW Command - System File Checker
It also may be worthwhile running from a command prompt at boot instead as that way those system files are not in use at the time which give the scan a better chance of repairing them - SFC /SCANNOW : Run in Command Prompt at Boot

Danny