ive recently been given a friends computer to "fix" because it is ridden with spyware and viruses to the point where windows wont even load. I have managaed to fix this (doing a repair install as there are several user accounts all of whom have data which they dont want to loose) and althought i can now get into windows the machine is still incredibly slow, it wont let me access the task manager (either from ctrl alt delete or run taskmgr it says that another application is using it) I have tried to install AVG virus scanner but the installation fails. Im just wondering if there is anything else i can try to sort this pc out with out resorting to reformatting completly, i can back up the data easily enough but didnt really want to have to go thorough the hassle of reinstalling windows, drivers, apps and then giving each user their files back as this would take forever. any other suggestions would be much appreciated.