I had Windows 7 installed on my system for a few months. But I started having some problems while connecting to internet. I got my hands on Ubuntu Ultimate, so I tried linux for last one month or so.
Now I want to go back to good old Windows XP. I have an installation CD which I had tried previously. But now when I try to install the first part of installation goes without any trouble. The one where you accept licence agreement, format partition and all file copy. Problem comes after file copy is complete. System is restarted to boot from hard disk but it never starts.
Only thing displayed is "DISK ERROR". And after I press enter it shows
DISK BOOT FAILURE. INSERT SYSTEM DISK AND PRESS ENTER