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After having no clue about this previous question, I am wondering if it was possible to reset all screen related settings on a windows xp (SP2) ?

The extended desktop feature was working perfectly fine until one day I could not use it anymore. Running a ATI Mobility Radeon HD 4330.

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you need all the registry locations for it. or you could back up the registry and just start deleting :-) (its funny but very possible it is well marked in there) A Driver sweeper/cleaner (3dgurus) and tossing out the monitors in device manager, Then reinstalling the driver package, might be enough to reset it without trying to find all the registry locations. Usually a un-install of the ati/amd driver will NOT remove user settings. – Psycogeek Nov 10 '11 at 8:56
I wasnt sure if you were going to come back to your original question (older) I was thinking that it might be possible that JUST a cleanup of the junk in the device manager alone might help. Do the hidden devices tweak, and get rid of the leftovers. it would be a start. – Psycogeek Nov 10 '11 at 9:02

(Unsure if this is mentioned in the other question)

One 'neat' trick within XP is to boot into safe mode, delete items from device manager (some unplugged/hidden/'installed but not detected items' - will show up that you don't see in normal mode) and then reboot into normal mode. They'll get redetected and reinstalled if needed.

Very handy for replacing faulty graphics/network cards, changes in monitors, undetected USB devices & faulty USB drives etc.

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Thanks I will try this solution asap. Edit: Indeed even not booting in safe mode I have two "Default Monitor", damn, this begins pretty well ! – Mulot Nov 11 '11 at 5:10
Let us know how it goes, goodluck! – HaydnWVN Nov 11 '11 at 15:08
In fact not "Monitors" menu is available in safe mode, which is weird. Anyway even if I remove one of the "duplicate" of default monitor, it will reappear upon restart. I will try updating the video drivers but it was working fine before with my current drivers. – Mulot Nov 16 '11 at 1:00
Remove both and let Windows redetect what is actually there (+active) is the trick :) – HaydnWVN Nov 16 '11 at 13:49
After removing the two default monitors, every time after a refresh of the devices (external screen VGA plugged or not), the same two default monitors appears.I don't know if at the time it was working it was already like this, but this seems weird. – Mulot Nov 17 '11 at 1:06

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