Must Reinstall NIC And USB Drivers After Every Reboot

firstly, I'm running a gigabyte P35 motherboard with a quad core processor and 2 gigs of ram and an Intel chip-set etc. As for hardware, everything is ok and I've had no problems up until now.

About 4 days ago, after rebooting my pc, I noticed firstly that my internet was not working. My pc was telling me that there was no network available to connect to. I did the usual things like power off my router, unplug the ethernet cable from the pc, restart the pc etc, nothing worked. I then thought that perhaps there was a driver problem. I uninstalled my router, and reinstalled the driver again. Lo and behold, it was working.

However I then noticed under my USB devices in device manager that they all had the little yellow " ! " mark and none were working. I had to uninstall and reinstall all those drivers again, same as with the NIC, and they worked.

I had hoped that this was the end of that bizarre incident but that was not the case. After a reboot, the same thing happened again. Since that time, every reboot has yielded the same results and it is a real pain in the ass to have to reinstall everything again, and again, and again.

I have no idea what the problem could be as I had no updated anything or installed anything new for this to happen. I've been reading through these forums and noticed one person having a similar USB problem but I believe mine may be a little bit different so any light that could be shed on this would be more than appreciated.