Custom built, 450 Mhz AMD, Epox MVP3 motherboard, 256 RAM. Every 4-5 days my system loses it's ability to communicate with my USB HP6200 scanner. Though it's still visible in device manager, removing it, and rebooting, the system finds the scanner, installs the driver, and everything works fine for another few days. I've also had this problem with another scanner, connected through LPT1, so it's not USB related. Also, installed a USB Aiptek camera. When fully installed it works as designed. When rebooted the camera no longer works and device manager indicates there is a problem with the camera or with the software. Note: Software and camera works correctly on another computer.