What is wrong with my PC?

I have an old HP PC ,one o the 1st P4 PCs.I've been havin alot o problms wit it lately n I wonder if they're all conectd.Whn I switch it on,it shows tht there is a CMOS settins error.I start wndows 2000 pro, it says tht there is an error with my hdd cos o impropr shut down n needs chkng.If I run the chk wndows dosn't strt.It gets stck at aplyin securty settins.If I skip the chk thn it strts up.But thn progs like Yahoo,MSN,Ad-Aware,iTunes etc. dn't wrk and they dn't uninstall.So I manually deleted all their files rcntly but they wn't re-instal.My IE keeps showin secrty warnins n the Gmail login page shows the wrng no. of free MB at 3560.The PC shuts down f9.I had an adware prob on my lappy recntly n I dn't know whther the prob got to my PC thru my router.Is it possible?My lappy is f9 though.The PC showd hardware err when i tried re-installin 2000 pro.Is there a prob wit my router or intrnt conn?it wrks f9 wit my lappy n fone.Is it pc hrdwre?Pleez gimme reasons and sltns.Seroius answrs.

What is wrong with my PC?vincent

Ok, due to your shorthand, I can't really understand what you are trying to say. Next time, don't type like you are text messaging. In your circumstance, try to backup the hard-drive and use computer recovery, if that's possible. It will take care of the problem 99% of the time should you have a programming error. Otherwise, your computer is probably fine. I've seen this happen before when hard-drives are either damaged or have been scrambled. So, like I said, backup the data and use computer recovery. You might need to reinstall some things though.