McAfee trojan deletion?

My computer (xp) kept on showing this message about this csrss.exe thing....i have no experience with computers but i looked it up and it said that it's a system file or it cud be a virus??? i searched my computer for csrss.exe files and 3 results came up....i'll copy them onto this but can anybody tell me if any of these are viruses or not? please CSRSS.EXE-03323C54.pf location=C:\WINDOWS\Prefetch csrss.exe location=C:\WINDOWS\system32 csrss.exe location=C:\WINDOWS\ServicePackFiles\i38… P.S. i scanned them with AVG but it said that it has no infections...i don't know if i shud trust AVG I also scanned my whole computer with AVg and the sign about the csrss.exe doesn't come up anymore but i need to know if any of those files are viruses or not...thanks for the help hydroxycut reviews