Do you have another computer you could try this on?
Not a clue... I'd restart the PC, do windows update. Then, check if the hard drive or c: is full, then I would check if RAM is being maxed out during the process, which should be fixable by turning off all other applications during the process. Then you could try turning off any anitivirus while doing it and finally I would check hard drive for damages and then check RAM for damages (how do you even do this...)