|I have resolved the issue with the help of Hirens Boot CD which proved to be immensely useful.|
I do not know how but my entire C drive had been wiped clean after the mentioned error, so I could not restore my PC. I was left with no other option than to re-install Windows. I used Hirns Boot Cd to copy my data from the system to a pen drive and then formatted windows.
The pci.sys error I was getting was because
I was trying to install XP SP1 when my PC had SP2.
Thanks for your help too
message edited by dirtydumpty