Many thanks for the reply.

Yes, I'm using Windows XP. The Disk Manager shows healthy status of the pen-drive. I tried to change the drive letter but doesn't work. In the properties option, I have:

1. General
2. Autoplay
3. Tools
4. Hardware
5. Sharing

Under tools, I tried error checking with automatically fix file system errors but it refuses to run saying the disk is write protected.

I can't understand why only this desktop is suffering the problem. Whereas all other desktops and laptops are being able to copy files easily into pen-drive.

Hey.. I just discovered that this desktop is also having problem in burning CD/ DVD... when I try to copy files through the CD/DVD Drive in Explorer... It says that an error occured:


PROBLEM COPYING (dialog box heading)

Winsows encountered a problem when trying to copy this folder. What do you want windows to do?

<file name with folder preview>

buttons: Retry, Skip and Cancel

<tick box> Repeat my answer each time this occurs
I also tried unstoppable copier (the white cat thing), and it too didn't worked.