My Fn key and F10 and F11 keys no longer adjust my display brightness

I have the IQ816 [vista] and it now will not adjust using the method in my title for this post...I think this has started since I got the latest update which was "nVidia-display-NVIDIA GeForce 9600M GS" that came out on Sept. 02, 2010..the update came from Microsoft updates...I'm almost certain this is the source of the problem...I tried the display settings in the power setting from the control panel and went to the high preformance setting there and also to the advance settings and then to display and turned on adaptive display and also set display settings down to 50% to see if it would do anything, but still no change....I hope I discribed this enough for you all.
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the driver I installed that caused the problem came from the Microsoft update....so to get back to the original driver I went to my control panel and then to Device Manager and clicked onto the + sign of the Display adapters and it opened the NVIDIA GeForce 9600M GS by right clicking it and I then clicked onto properties and then clicked onto the Driver tab and then the Roll Back Driver and then followed the instructions or just clicked on the OK button [I can't remember if there was instructions or I just clicked OK] but you will see when you do it...I also can't remember if I had to do a re-start or not but after doing things like this I always do re-starts any ways...it went back to the driver that made everything back to normal and now when I go to the NVDIA properties and click onto the Driver Tab the roll back driver button does not highlight and I suspect because there is no driver to roll back to now...I will now stick to updates for my PC only if they come from HP or the maker of a component of my PC and only do Microsoft updates that are just for the operating system...hope this answers you question...it's kind of long but I know when I ask a question on things like a PC that I very seldom do changes to I like to know all the steps so I don't goof up...haha...best of luck.

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Jane
2015 X1 Carbon, ThinkPad Slate, T410s, X301, X200 Tablet, T60p, HP TouchPad, iPad Air 2, iPhone 5S, IdeaTab A2107A, Yoga Tablet, Yoga 3 Pro
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My Fn key and F10 and F11 keys no longer adjust my display brightness

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