I am having problems with a VERY slow computer, in normal mode it takes forever to boot into windows, in safe mode it boots more or less as usual. Operating system is Windows XP. As its OK in safe mode I naturally assume its contamination from some software but so far I have run, in normal and in safe mode, Spybot, Ad-aware, Ewido, AVG, Norton antivirus and an online scan fron Panda software and have found a few items but less than a couple of dozen in total. I have ran Hijackthis and nothing stands out as being a problem so at the moment I am a little stumped. I have also tried system restore back to a couple of months ago. Any suggestions as to what to try next?