Back on Topic. Computers are influenced by a strong EMF. This can be in the vicinity of machines that use VHF or UHF energy at high levels.
And the electrical wiring is a suspect also. Try plugging a la with standard light bulb n the electric plug. Notice is there appears to be flickering. This may indicate the pretense of powerful EMF in the area.Also try a florescent fixture. It is stays on after you turn it off, there is a lot of EMF.
But the simple answer is a defective plugs downstairs.