RBM (remove this) wrote:
The first thing you should do is verify that there is no ground. If the
cable is metal, that would serve as ground and you can buy ground wires to
connect to the box and receptacle or self grounding outlets


exactly, upgrading to 3 prong is easy if metal cable like BX or conduit
was run in the first place.

you might also ask your neighbors, who have likely been thru this.

to protect computer a UPS is prefered, be sure to run phone and modem
thru UPS.