I have and old HP desktop with a 2.6GHz P4, 1.3GB of RAM, and an Nvidia GeForce 6200 graphics card running Mac OS X 10.4.8. When I try to insert my USB flash drive, nothing happens, so I remove said drive. When I remove the drive, the OS slows down and the graphics get choppy. I have to reboot the machine for to correct the graphics problem. Any help would be greatly appreciated.