Posted 20 April 2011 - 09:53 AM
My system is 2.0 GHz AMD Athlon64 processor with 2.4 GB memory and Windows XP Home Edition with SP3.
All USB ports and card reader slots have stopped working, and CPU usage (System - not system idle process) runs close to 100% - No hardware or software changes had occurred that I can remember. Ports seem to have power (when I insert a flash drive, the light comes on momentarily, then goes out). USB Ports and Card Reader don’t show up in My Computer.
- SysInternals Process Explorer shows USBPort.sys is the file causing the CPU overload. When I suspend this file from process explorer, CPU usage is back to normal, but this has to be completed on every start-up. USB ports still don’t work.
- Did a System Restore to a previous date (~ a month earlier)…no help.
- Disabled the USB host controller and the root hubs, but system hangs when uninstalling USB host controllers.
- Replaced the usbport.sys file and restarted in case it was corrupted, no help.
- Have run several spyware and anti-virus programs, both regular and in safe mode (MalwareBytes’ Anti-Malware, SuperAnti-Spyware,AVG anti-virus). Nothing found.
- Have disabled USB functions in BIOS… this corrects the CPU usage issue, but of course this eliminates functionality of card readers and USB ports. Seems to be only way to utilize other computer capability.
I would appreciate guidance on how to proceed to troubleshoot this issue to regain ability to use USB ports and card reader. Thanks.