Here is the problem. This PC is running Windows XP Pro with SP2 and has been updated with all available updates. When you boot the machine and login everything comes up fine, and than after just a few seconds the desktop disappears icons toolbar everything. I pressed ctrl+alt-del and got into the Task Manager and noticed that explorer.exe was missing. I was able to run explorer.exe and the icons and everything came back. I ran the latest version of Hijack this and saw an entry relating to (winsync) entry 04 HKLM\RUN...(winsync)yyyakkk.exe run_reg C:\Windows\System32. This looks like this is a masked file in the system32 dir and nothing I've scanned this PC with detects it. I ran Ad aware, Norton Antivirus Corporate, Panda, cleaned all instances of (winsync) from the registry, ran cc cleaner, deleted all items from Windows Prefetch, and removed all items from startup, but still the problem remains. In Safe mode the PC runs normal this virus only loads during normal operation. This is a good one hopefully someone has seen this before and can help.
Thanks in advance.