Format Inserted pendrive  

Acer aspire 5750, Window 7 Home basic 64bit.. Laptop says to format every pen drive I insert..even when I insert new pendrive it says to format..any software or tools I could run to solve this issue.?
Additional: I'm gonna buy a new WD hard disk and I don't want to ruin it.. Please give me suggestions on what should I do when I receive the Hard drive??..I mean what all tests I should run on this new hard drive to reach it's maximum performance and check issue related it's hardware..

If you format the USB does it then work OK?

Does the same pendrive/s behave normally and accessible on any other working PC?

Corrupted system files most often can cause this problem. Run the option 2 in this tutorial SFC /SCANNOW Command - System File Checker - Windows 7 Help Forums and check whether it could find and repair the corrupted files.

samuria said:

If you format the USB does it then work OK?

Yes .It works when I format the drive.

Do you eject pen drives or just yank 'em out?

badcrc said:

Do you eject pen drives or just yank 'em out?

I eject them..i remove only when "safe to remove your drive "dialog is shown..

jumanji said:

Does the same pendrive/s behave normally and accessible on any other working PC?

Corrupted system files most often can cause this problem. Run the option 2 in this tutorial SFC /SCANNOW Command - System File Checker - Windows 7 Help Forums and check whether it could find and repair the corrupted files.

Thank you..This worked for me..

Thank for the links Vineet Garg..that really helped me..

Thank you all...guys.