Try this; worked for me. : )
I had this same problem, tried everything. Then remembered that in the past I've had issues with memory. Either my memory stick(s) have bad block/connector/etc. or the socket. Since I'm very tight budget and cannot afford to buy new memory and or computer, I simply rotate the sticks. This also was the cause and remedy for inability to send attachements with email.
When I thought about it for about a day, that old "rotate the sticks" solution idea came up.
I did it and sure enough, fixed the problem.
I think this is one of the things that could warrant sticking a PostIt note above the monitor when it seems all else fails,
YMMV. I'd like to hear if anyone else has had this issue, and maybe the same solution.
Thx!!