I posted a month ago that my USB drives will not be recognized after computer is running for a while.  In order to open flash drives, i need to restart my computer.  Someone had mentioned that they might be powering down?  I am not sure how to fix this in my settings.  I have windows 7 on an HP.  This is driving me crazy when i want to quickly open a file. Can anyone give me instructions how to fix this?  Any help is appreciated.  Thanks! 