Flash Drive Missing

"I plugged in my flash drive in USB, it recognizes it but there's no autoplay. So i checked in "My Computer" and... The flash drive is missing!What happen?I thought maybe the flash drive is broken so I rush to the nearest store and get a new Kingston Data Traveller 4GB. But the result is the same.Then I tested the two flash drive at another computer and it worked.Now, is the flash drive unformatted?or corrupted?or maybe my USB port is the problem...?"

There are several causes to this problem.Let's try to fix this step by step.Lets assume that USB port broken is the worst case.And please, no FORMATTING needed in this case(although you can format it using the technique I've posted recently on how to format external HDD but trust me it wont work). What went wrong? Before this you can use it but suddenly you cant.What is the last thing happened to your computer before it went wrong like that? Any last software you installed or uninstalled?

Any error found before that? Well, in this case I found that this guy has installed a virtual drive mounting software(Daemon, Alcohol, etc..) for gaming purpose.Then he uninstalled it wrongly and after that this happen.To fix this, you dont need a Windows CD or tools.what you should do is :

• Go to c:\windows\system32
• search for these files sptd.sys, secdrv.sys, sptd7021.sys
• delete all this file and reboot.

If you found that there is no sptd7021.sys, but sptd####.sys (#### means other number) and you are unsure to delete it, check for the file date. When it was created.If the created date is same as the two other file(sptd.sys and secdrv.sys), you can delete it. After reboot you can use your flash drive again :)

(note: If you are unsure about deleting them, try to make a backup by copying the files to other folder before deleting them.)