Have Dane-Elec 4 MB USB; works in one CPU great, in the other, I had to reboot, and then when I look at "My Computer" it appears and disappears every few seconds and I can't access it. Running XP both CPUs.

In Control Panel, click on "System." When the System dialog appears, Click on "Device Manager."

In Device Manager, click on "Disk Drives." That should drop-down and reveal your USB drive as a USB device.

Right click on your USB device and click uninstall, then reboot.

This procedure will uninstall the drivers for your device. After rebooting insert the USB drive into a port and a "Found new hardware" window should popup. allow internet access and reinstall the driver--this should be pretty much automatic; just make sure you allow the program to search the internet for the latest driver.

Good Luck!