Are you trying to do the factory reset from a pre installed recovery program that came with your pc. If so try the following , make a set of factory reset discs from within the software. Next restart your pc and as it is booting up keep pressing the cd/dvd drawer until it opens , as quickly as possible put the first of the discs into the drawer and close it. Eventually the pc should detect the disc and start running the recovery program..... this is what I did when I had a Packard bell pc.
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