Unable to load Windows XP on startup

[KJC]

HI.

I am unable to load Windows XP on startup after I have
installed Norton Internet Security, ran live update and
restarted my PC. A window containing the error
message "Isass.exe - System error : An invalid parameter
was passed to a service or function" kept appearing and
upon closing it, my PC will restart itself. The furthest I
can go is to see the Windows XP logo and the error
message.

Is there anyone out there who can advise me on this
problem? Thank you.

KJC

 

[Guest]

If your trying to install XP by doing an upgrade from
your current version of Windows you should turn off the
AntiVirus program. Ever thought about a clean install of
XP?

 

[KJC]

Thank you for your prompt reply. Sorry but perhaps I
wasn't clear about my problem.

I wasn't trying to install XP but just restarting my
computer as instructed by the Norton Internet Security
program after running its Live Update. However upon
restarting the computer, I could not get back into Windows
and I would get the error message appearing instead.

I did think of re-installing XP again but I have some
important data in the computer which I am afraid would be
wiped out after the installation. Would love to exhaust
all possible remedies before attempting such a measure.
Thank you.

KJC

 

[DL]

http://securityresponse.symantec.com/avcenter/venc/data/w32.hllw.polybot.html
just one of several hits from Symantec security response
Tried Safe Mode?