If you are a computer user, then it is highly likely that at some stage you are going to run into one of the many common problems that can affect your equipment. It is something we all have to deal with, but it need not be a huge issue. There are many computer users who will panic and call tech support for assistance, but in reality the majority of common faults are easy enough to take care of on your own. This could end up saving you time and money in the long run.
The rest is here:
Unrecognized USB Devices Need Not Cause You Stress