I can't open my drives D: and E: ! When i try to open these drives, it said " The drive D: (or) E: is not formatted. Do you want to format it now? " I can open these drives in the morning time! But, it happened at the evening! I don't do nothing about installing or uninstalling softwares! What is happening? Please tell me how to solve this stuff because i have so many important data in these drives! Moreover, the presentations that i have to be present in next monday are in the drive D:!





Thank you so much
Youngcesar

Try a System Restore to a point prior to the problem.

start > All Programs > Accessories > System Tools > System Restore

Normally 'testdisk' will fix the problem. Be sure to read the How-To-Use first. Paying most to 'repair boot record'. Be sure to download the one for XP, not for Dos or Linux.
TestDisk - CGSecurity

What is happening?

It happens with XP sometimes that the Volume Boot Record (VBR) gets corrupted, what testdisk does is checks if the primary VBR and its backup are the same or not and lets user overwrite the primary with the backup.