It really helps if you could succinctly describe what's going on with your computer, when it started happening, what you were doing when it first started with the symptom, what you think the problem is, and where necessary, how it should normally function. Please think about all that before you contact your friend so that they can more efficiently figure out the cause, come up with some solutions, and implement it.

Offer to buy him/her lunch!

Then have them enter in those 9 digit numbers you get from following the above video on https://join.me.