Hi guys
I have a pretty old computer running windows xp and a while ago I got a worm and trojan which caused loads of problems so I ran my anti-virus software and re-installed windows. However on doing a search I can see that loads of files have not been erased when I've re-installed. I am unable to use the format command in DOS as I get an error that the disk does not support format, my cdrom drive is not bootable so I use a floppy to reinstall winodows. I really want to make sure I've wiped the hard drive clean-any ideas?