Best bet is the small VR's. A 350 watt can be had for about $45-$50. It can handle puter, prntr, modem, scanner, etc and becomes a part of system. I used this method in 1985 with the IBM desktops. They were very sensitive to voltage. Also, check the specs of the puter. There are a few that have built-in VR's.
Rowdy