Did you run malwarebytes?

nope

Try malwarebytes first if that does not work ccleaner, unhackme and combofix are others

TRY unhackme and combofix

Have you tried a different xp cd?

Usually hp installation cd's will wipe the hard drive and erase all the data if you want to do that, You can download a copy of a bootable recovery console burn the .iso to a cd and boot to it if you...

Use the windows boot cd, boot into repair console run chkdsk /r

Sounds like you need to reload windows, can you boot to safe mode with F8

Why can't you install it cause you can't get on the internet you can download it on a mac put it on a usb stick but the usb stick in the pc and run the install

sounds like you have a bad keyboard

Is this vista or xp? If malwarebytes won't install try this

Could be similar to what's been happening with Antivirus 2009, you can check your device manager (right click on My Computer, then click...

Try running malware bytes and ccleaner

What model dell?

Put the cd in the drive and boot it it should ask to boot from cd then re install windows if you reformat the drive you will loose all your data

The control panel icon are links to .cpl files look in /windows/system32 and see if the files are still there if they are then the malware hid the icons in the registry or in the group policy...

Some of the bad malwares replace vaild windows files and you have to end up reloading windows. You can try start menu run type in cmd press enter type in sfc /scannow which will run a scan and make...

Download malware bytes and ccleaner to a usb stick see if you can load and run them if not try to do it in safe mode

You got yourself into a real mess! Symantec and Mcafee won't clean these types of malwares. You need to download malware bytes onto a usb stick and ccleaner load them on the dell via a usb stick....