put your setup CD in and search it for the file driver.cab. Im not sure where it would need to be on your PC but if you have it on the CD, maybe you can just save it to where it should be. Search your PC for other .cab files and put it in the same one. I searched the microsoft site and found this...
Copying a large Driver.cab file to the local hard disk instead of leaving it on the CD or network has the following advantages:
With the driver set on the local hard disk, users do not need the Setup CD to install new devices, which especially benefits mobile users. Exceptions are products with Windows drivers that are not included on the Setup CD.
Users do not need local administrator rights to install new hardware because all device drivers stored in Driver.cab are on the hard disk and are digitally signed.
For network-based setups, copying the Driver.cab file to the local hard disk reduces bandwidth requirements in these ways:
During setup, less system and network overhead is required to copy the single large Driver.cab file than many small files.
During subsequent hardware installations, driver files already reside on the local hard disk, and do not need to be copied over the network.
so it looks like your PC should operate fine with out it as long as the drivers were able to be installed for current hardware....