I have exactly the same problem and it is so very frustrating my Microsoft surface pro was purchased in June 18 and of course the two year warranty expired in 1920. I am furious. I am partially sighted, a lady of a certain age and this was a life saver when first purchased. I am still actively retired with many local responsibilities and this, especially with lockdown and so much Teams, etc., is really embarrassing. I would find it difficult recommending the sort of money I spent on this to product to anyone else. Please give me some easily understandable tips, I have removed, reinstalled, run virus checks etc., all to no avail. Works for about 20 minutes if lucky. In desperation. Hey present USB service not recognised popped up again. At least my touchpad is still working, it will not for long .
Diane M.
Kent
Engand