It sounds like your antivirus program has found evidence of a serious kind of
virus. You may be able to fix it by following the instructions that came
with your virus scanner. However, it's not always possible to recover an
infected computer. The safest course of action is to back up all your
documents and re-install Windows.
I'd strongly suggest that you not use that computer for internet banking or
other "secure" stuff.
> Today i scanned my system and got the following notification.
> "The On-Demand Scan found alterations to code or data which may
> indicate that a rootkit is attempting to hide files, registry keys,
> processes or other items. If this scan fails to find anything then the
> computer should be scanned with McAfee PreScan or booted into Safe Mode
> and this scan run again"
> What is the problem and what should i do now?
> Please guide me.