>Since I installed Windows 7 Ultimate SP1 64 bits, there is a constant flickering in the background, such as every five minutes. Something is being refreshed. This is new since I installed SP1. Has anyone found something like that? At first, I thought I didn't see it correclty or that was caused by something else. But, this is really constant, at interval, and refreshes something. Anyone has some information in regards to this?

Win7 can cycle through screen backgrounds every few minutes. Check your settings under personalization.