When trying to change windows dreamscene background explorer.exe crashes and restart.

hi experts.

I am running windows vista ultimate edition.I installed windows dreamscene as an ultimate extra.
Dreamscene(video background) worked,until recently.
now when i want to switch on dreamscene via "change desktop background" an error message appear telling me that explorer.exe crashed and has to be restarted.I am running mcafee with the latest dat files and found no sign of spyware or viruses.the system is an amd am2,with 1 gig ram and onboard nvidia graphics.i also downloaded all the updates from microsoft,bt the problem persists.


any hep would be greatly apreciated.
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raiden69Asked:
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Computer101Commented:
PAQed with points refunded (250)

Computer101
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avatar-eCommented:
Seem to be related with video drivers, are you upgraded codecs or something?
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raiden69Author Commented:
actually wasnt codecs but the problem seems to be fixed now.apparently someone messed around with dep (data execution prevention).restored it to default and everything is fine now.explorer isnt crashing and dreamscene is running smoothly
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