It only happens when up-loading to the forum, or to an e-mail. Sometimes it'll work fine, other times two or three pics will up-load and then the PC "freezes", and other times just one pic will up-load before it "freezes", when i then have to either re-start, or shut down and switch back on.
To up-load, say, six pics can take around an hour !
Everything else is working fine, both on the 'net, or with all other systems with 'net connection turned off.
That said, it is sometimes slow, and I get "not responding" now and then.
I've just tried to contact my computer specialist friend, but have had to leave message. He may be able to analyse the problem remotely, and then hopefully get the PC in for service / repair.