Occasionally my Windows 7 taskbar gets corrupted with a cascading like effect (see attachment). Happens every 2-3 weeks and usually after resuming from standby, although once it happened after a reboot.
• Logging off or rebooting with fix the problem
• A screenshot (using print screen) does not show the corruption (the attached picture was from taking a picture of the screen with a camera)
• No 3rd party programs have been used to modify the taskbar
• Graphics drivers have been updated several times to the latest release, but still no change
Windows 7 Pro x64
ATI Sapphire HD 4670
Intel i5 750
Corsair XMS3 PC3-12800 (4 x 2GB)
Any thoughts? Thanks for your help.