Answer to: Why are my USB ports not working?I had a similar issue, the right hand side usb's of a customers laptop were not working as well as the DVD drive. I started with the DVD drive and removed upper and lower filters in the registry. This also fixed the usb's, I did not know however if this was a fluke. A few days later I had a similar job, but only the usb's were not working. I removed upper and lower filters and they started working fine. To get to registry: Press the Windows Key + R. Type regedit into the "Open" line and press enter. Expand "HKEY_LOCAL_MACHINE", then "SYSTEM", then "CurrentControlSet", then "Control" and finally expand "class". there should be a folder approximately ten down starting with "4D36E965" select this. Inside if you see any files with UpperFilter or LowerFilters delete them. Restart your computer and hopefully they should be working. I hope this helps.