salamader

Hi, for the last few weeks my pc has been experiencing continuous blackouts and restarts. My pc is only 10months old and i built it myself last christmas and its been perfectly fine until about 2 weeks ago. It will restart at intermittent intervals, sometimes it will last hours, other times (like just now) it will restart itself in quick succession with a matter of seconds. now. i have done a memorytest and a cmd --> chkdsk checks, the temp throughout the pc is fine (ive even put new thermal paste in) and the power supply is fine (although id be surprised if there was hardware failure after 10months). yesterday was a bad day, and it was almost unusable (thankfully i have a laptop!) and on the system repair it said that: d:\fwkpkclnt.sys and d:\windows\system32\drivers\tcpip.sys files are corrupt, ive had a look at these online and it seems rather common but i cant seem to see how people have resolved the issue! i have reformatted my drive multiple times with the same effect and i would be really grateful if someone might be able to give me a few pointers on what to do next :) as a note, im using windows 7..although..its not..geniune..but as i said, everything has been working perfectly up until now. i have a copy of XP at home..could wiping and reinstalling XP instead possibly solve the issue? im also writing this whilst my dying pc is running in safe mode and it hasnt restarted or anything..which to me is an indication that it is software based? i would be really grateful if anyone can help me out, ive just started my MSc only last week so id love to get everything up and running again! Thanks :) also! i just wanted to add that i have set my settings so that the pc doesnt restart automatically after a system failure in the hope that the BSOD will give me a helpful code...but it just restarts regardless..does that indicate towards anything?