USB device not recognised error

I recently moved job locations and plugged my flash drive into a Windows XP computer with no problems at all.
After a few days, however, the dreaded "USB device not recognised" error appeared.
I tried all the solutions online:

• Turn computer power off at the wall
• Uninstall USB drivers
• Set USB sleep timer to never

None of them worked. I then realised that I had mapped a network drive to a new letter just before the problem appeared.
I went to http://www.uwe-sieber.de/usbdlm_e.html and downloaded the USB Drive Letter Manager and edited the ini file to manually force the USB drives to the letter I specified.
It worked! I haven't had any issues since.