help with my kernel 32 dll

[kevin]

i had a virus attack many months ago and it infected a
dll called kernel32.dll and it repaired the virus from it
after a while but it caused problems with it now because
some programs didnt work saying something to do with
kernel32 and my computer cant be set back to a amdxp
2000+ it restarts automatically when it starts up and it
causes over heating problems now im my computer so now i
have to run my computer as a 1.25 athlon by setting it in
the bios to prevent restarts in my computer again. I read
in a forum that error with this kernel32 dll can cause
cpu overheating and i want to replace my kernel32.dll
with another one. I have windows xp and i dont know how
to and where to get another one. I tried to update
windows by installing it again in my computer and it said
it couldnt find kernel32.dll and it didnt fix any
problems can someone help me please. send any help to

thanks kevin