Windows slow to load from Logo to Welcome Screen

[ocar23]

Since a suspected virus attack, I have a problem related to Windows loading
to the Welcome Screen. When the Progress Bars stop on the Windows Logo, it
takes 60 secs to get to the Welcome Screen. This is something new, only since
aa apparent Virus Attack. Can you advise what files could be affected and how
to correct the cause of this annoyance. FixMBR, FixBoot, SFC , Chkdsk have
not helped.
Also, but not neccessarily part of this problem, First Boot hangs during
BIOS Memory Test, Re-Boot is successful.
Win XP Pro SP2 ++++, P4 3.0, DDR400 4Gb on GA-81PE775Pro with GeForce 6600GT.
Any suggestions would be rather helpful. I have had this before but have
mislaid the fix.

 

[ocar23]

Since posting this I have found a) Boot.ini entry =
/noexecute=optin/fastdetect/noexecute=optout, and b) AVG AntiSpy Scan
revealed kernel32.dll, user32.dll, shell32.dll, ntoskrnl.dll, under the Tab
of Result/ Infection, all were marked "change". Can you also advise on these
extras as to what effect they may have on the problem and how to correct, if
it is possible to do so.