About once in every 10 times my computer boots up with the wrong screen resolution.
I normally run at 1440x900 but sometimes it boots up at a lower resolution. It then rearranges al my carefully placed desktop icons for me and if I don't immediately restart, it saves the new positioning and low resolution permanently. If I restart without doing anything else, it boots up in the correct resolution and with all the icons in their proper places.
The error must be occurring early on because it also affects the Windows Login screen, so if I'm lucky I can spot the change their and restart at that point instead.
I've run an SFC check following the tutorial instructions here. The only problem detected is apparently a problem with "PINTLGNT.CHM" of Microsoft-Windows-IME-Simplified-Chinese-Core that is apparently referenced by KB948465 and has a "hash mismatch". I don't do Chinese, surely this couldn't be the cause of the problem.
I've updated the driver
software and it made no difference. The display is "Generic PnP monitor on Radeon X1550 Series".