PQI U273 4Gb Flash Drive not recognized by Win 7 after first use.

1. Click Start, then type device manager in the Search box, then click Device Manager.
2. Expand Universal Serial Bus controllers. Right click a device and click Uninstall. Repeat for each device.
3. Once complete, restart your computer. Your USB controllers will automatically install.

I have the same issue but this is from the original O/S windows 7 recovery DVD that came with the system, I have the original DVD external DVD Rom Drive, it starts to read and just stops responding

Try the flash drive on another computer to see if the problem is the drive itself. The drivers for a USB flash drive are built-in on Windows 7, so the problem is NOT that the drivers aren't loaded. The problem is almost certainly that Windows is not correctly identifying the device, which is almost always a problem with the device itself.

If the drive does work in another computer, be sure that it is formatted and put a couple of files on it and make sure that the computer can read those files - then try the flash drive on your laptop again.

If this flash drive works on another computer and still doesn't work on your laptop, try another flash drive on your laptop. If the other flash drive gives the same error, then you will probably need to repair your Windows installation - which is a job best handled by someone with more experience unless you are willing to risk whatever else you have on the laptop by just doing a full reinstall of Windows.

Sometimes flash media is not recognized or fails to be recognized by the system. There isn't really much you can do besides buying a new unit.

solution 1 .use the lifetime wty. solution 2 .try to enter command prompt and and type in e:\ press enter that is if your only running one drive(c:\) and a dvd\cd(d:\) if not it will be the next letter. hope it helps. personaly i would go with solution 1.

http://www.pqi.com.tw/upload/download/Fixer%20v1.0.0.2.zip use this on xp

it is lock

test with "H2testW" , if the program works and tells you you have errors, run "PD V1.08 B3"

if when selecting usb drive and it states to insert disc... it's stuffed.

This happens when a malware or a virus attack on files and its not able to recognize the drive. One option is to put the flash drive in a computer which is having a updated Antivirus software and most of the times, it recognized and remove the virus.