I have a 16GB PNY USB Pen drive that suddenly became inaccessible from my Windows 7 and XP systems. Previous to the failure I was using an early version of the freeware USBSafeguard running from the Pen drive to browse the internet safely. I don't remember if i shutdown everything correctly before I removed the Pen. I do know that I didn't do a safely remove hardware and exject media command before removal.
The next time I plugged the Pen into my system I got the message new Memory Bar hardware found and new drivers were installed. This happened on both systems when I plugged in the Pen.
Problem: The Pen drive does not appear on my systems. There is no drive letter assigned and if I manually assign a drive letter the device is not available. The strange thing is that on my Windows 7 system if I have the My Computer window opened showing the devices on my system the Pen is displayed as a removable drive with a drive letter for less than a second. It's just a brief flash on the screen.
At this point I'm just guessing what might be wrong. I was wondering if the USBSafeguard software could have failed and made the drive inaccessible. I sent an email to USBSafeguard a few days ago and haven't heard back from them yet.
additional note: I did not have the device password protected or locked at anytime.
If possible I would like to recover my files from the device. Any advice you can give me would be greatly appreciated.