I agree that I must have cleared out all the spyware however my computer was running extremely slowly again after all this. I am linking it to using Driver Cleaner to remove the Nvidia display and motherboard drivers as I was getting random BSOD's that, from googling could have been a bad nvidia driver installation. I gave up on that installation and very very slowly...due to the pc!....backed up and installed Windows XP. Everything since then had been running fine until yesterday. Computer started freezing or rebooting without warning. Did a memtest and found that one of ym RAM sticks was giving errors so I removed it. The problem did not go away so after looking in depth into the Event Viewer for when the crashes occur I noticed that nvatabus was logged in the event viewer three times with "Device Identified" prior to each reboot. So off I went and uninstalled the nvidia drivers with Driver Cleaner however since that my computer now runs so so so so so slowly. I attempted to load the original drivers that came with my motherboard (Asus A7N8X-X) however this did not solve the slowness. Then attempted to install the latest again so I could have some speed and then solve the instability. Unfortunately that has not resolved this either. I have done a full test by seagate, the manu for my two HD's and they are both fine. If this topic should be moved then fair enough - just wanted to link it in to my previous issues. Any help would be much appreciated. Simon Edit: previous thread can be found HERE.