Legal Question in Criminal Law in California

The question is whether you had a reasonable expectation of privacy in what appeared on your screen. If the probation officer was in a place where he had a right to be, maybe not. Moral of the story: If you want to keep your attorney-client communications from the police, as of course you have every right to do, hit Alt+F4 (or other appropriate key) as soon as you hear the cops breaking down your door.

You should at least raise this issue with your lawyer. Regardless of your probation status, I do not think that probation officers or anyone else have the right to read confidential communications between you and your lawyer.