To reply to Ranchhand: I tried the system restore, your right it didn't help.
To Citizen_WD: When i transfer a file from the computer to the thumb drive the name changes from what ever it was to letters, numbers, symbols. Every file looks like its swearing at me. Although they are all visible, If you try to open them i get file not found.
Once the name has changed it stays that way no matter if you take it to another computer or not. You cannot open, delete, or move the files.
I only use one at a time, because quickly is not in this machines vocabulary. I recognizes a new drive, once you use it and remove it, if you plug it back in it doesn't recognize it.
I have avast and super antispyware which i use almost daily and keep updated. Whatever i have isn't touched by these because they say the computer is secure. and it's not.
I might have been tech savvy at one time in the 80s but now, not so much. You lost me with chipset, I do know bios but not sure i want to mess with it without directions.
So, I have deleted old unused programs, run both avast and super antispyware, used my system tools, to clean disk and defrag. I did disable and re-enable the usb when i first started having this problem monthes ago.Didn't seem to help.