Webcam, USB Ports stopped working suddenly

Hi everyone,
Wondering if anyone can help me, my webcam and all USB ports have suddenly all stopped working. Yesterday my mouse light was flickering but still working and today the same mouse won't light up at all. I tried with a different mouse and it would light up
but is not recognized by the computer and unusable. I tried both mice on a different computer and they work just fine. I also tried a few more devices with my usb ports and realized they don't work at all.
I was browsing the net yesterday and I tried the following suggestions already to no success:
1. Turned computer off --> pulled out battery --> pulled out power chord --> Pushed power button for 30 sec --> put everything back and turned computer back on
2. Ran sfc /scannow and ran chkd
3. Tried system restore to the last date I remembered my mouse working
4. Went to Device Manager --> uninstalled everything under Universial Serial Bus Controllers --> restarted computer
5. Installed any critical updates for windows
6. Tried deleting/renaming the INFCACHE.1 file but even after creating a new permission group (Administrator) with full control it put an x on it and wouldn't let me
7. Ran Microsoft's automated troubleshooter
Really not sure what to do now....has anyone else been in a similar situation and can offer any suggestions? I am using an HP laptop (HP Pavilion g6 Notebook PC) running Windows 7.
Is something broken with my hardware or am I just suddenly missing some drivers?

Refer : http://social.technet.microsoft.com/Forums/windows/en-US/fa620005-3b71-4bff-acea-c4c4ce45adc9/usb-ports-have-suddenly-stopped-working?forum=w7itprohardware
And
http://social.technet.microsoft.com/Forums/windows/en-US/b906fcca-44a9-4f98-8faf-a82e75a38cda/all-usb-ports-suddenly-stop-working-in-windows-shortly-after-startup?forum=w7itprogeneral
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Webcam, USB Ports stopped working suddenly

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