I recently purchased a house that was built in the 1950's and just about half the outlets in the house test with an open ground. After quite a bit of reading and research I tried to ground 2 of the outlets to a screw in the box, but they still read open ground. I then used a multimeter to test if the box was grounded, both show that they are not grounded properly as they read 0 volts when I test hot to the box.
I am wondering if there is anything I can do to fix this problem short of calling an electrician? All of the ungrounded outlets in the house are ones that our important electronics plug into and I would feel better knowing they are grounded and I can use a surge