Be adviced sir, that sometimes Windows updates are known to cause these abnormalities! Very common in fact! Depending on what you have installed of course in terms of microsoft related products etc. Also if windows update caught sniff of a driver update, and updated this behind your back, this could also be the conflict! On one of my laptops i had a io/ps2 thing update for the touchpad, and when i let windows update do its thing, the pc was a total disaster after the reboot... i had to go to failsafe mode to uninstall the update, and find old driver discs to get the old driver in on the touchpad again! So dont jump the gun mate :) Windows update can be cruel, just as cruel as malware! Or a wonky gfx driver update fx!