Drivers have disappeared

I was doing some printing and it was fine.Right in the middle of a multiple page print job I got a printer error. Troubleshooter indicted a HP Photosmart C310 driver was missing. I went to Device Manager and evry entry under OTHER DEVICES was missing their drivers. The C310 printer, the SM Bus Controller and the Ethernet Controller. Windows Update was unable to find and install any drivers.
Any ideas about why all the OTHER DEVICE components lost their drivers at the same time?

First, try to do a System Restore and scan your computer for viruses.

I did an image backup restore for several weeks ago (the oldest backup I had) and the problem was there too.\A virus scan does not reveal a problem. Was able to restore driver for printer but the other two remain elusive.

Hi blockie, go here ASUSTeK Computer Inc. -Support- Drivers and Download M2N-VM DVI download the chipset drivers (you may have to install the vista version) this will solve the problem of the sm bus and ethernet controllers