I want to install the newest version of firefox but it wont let me. The message it keeps giving me is that: Software Update Failed: The update could not be installed. Please make sure there are no other copies of firefox running on your computer, and then restart firefox to try again. And I'm sure that there is no other copies running on my computer. I've try restarting it a lot of times before but the same message keeps appearing. When I try to uninstall it, it tells me to reboot the computer and then try to update it after the reboot is done. I tried to update after the reboot but the same message appeared again. And the cycle continues.