Windows 7 64 bit: I just upgraded Firefox to 7.1 , I can't watch video on youtube, video freezes, then the browser freezes. I right click on the icon showing the page is open on the taskbar & click close then cancel, it starts then freezes again?

Question

When I watch any video on youtube, every video first starts with short freezes then freezes the Firefox 7.1 Browser window. I have to right click on the icon that shows the browser is open on the taskbar at the bottom of windows and then click on close& cancel to get it to start working again. Also, on any site, I am having problems with links & functions that suddenly stop working, site connections being dropped frequently for no reason, my Modem is stable & internet shows connected. On facebook when I click a button(photos) it doesn't work, in Amazon I click on "submit" and the button stops functioning, in yahoo mail I can click on a button to "send" mail and it won't work. I can open them in IE9 or Chrome but not in Firefox. I have tried disabling all plugins.I also have tried disabling all but flash and still the problems persist. I have uninstalled and reinstalled FF.

Answer 1

Command + R *should* take it to a recovery console. Command + Option + P + R resets the PRAM, but that doesn't sound like your fix.If all of your buttons are working fine on OSX side, I would ignore PRAM / NVRAM / SMC reset tricks, since these are tested as working fine. 
I would say you should probably reinstall the drivers for bootcamp. I tried this with 5 in Windows 8 and it gives you an option to repair. The reason I say this is because the UI isn't showing up, which means that it's using another driver.
If this doesn't work, go into device manager and then roll back to your previous settings.
One more thing comes to mind. Do you ever use Parallels or VMWare to load your bootcamp partition? They have their own driver packages which can cause some unwanted behavior when using windows natively.
One last thing you can do is try to by-pass the GUI powerplan entirely. You can use the Powercfg command, which, as it happens, has instructions on how to forcefully set the brightness values. You probably won't be able to make it through these instructions since you will get an error at some point, but that will give us more diagnostic information.
Good luck!