there is a virus on my comp which doesnt allow to view my hidden files and if we change the options in view also it goes bak to previous settings and not shows hidden files.
and also the c,d drives are opening in new window frm my computer

Troubleshooting Windows XP, Tweaks and Fixes for Windows XP

go there and scroll down to number 155... "Enable/Disable Show Hidden Files/Folders " and click on it and run the application to reset the registry.