when i install AE, and it opens the program, it says to close firefox to continue the install, even though firefox is already shut. any ideas?
Check the task manager. If it says there is Firefox, then most likely there is. The process may still be active, you only have closed the program Windows. Likewise, check, whether there is any otehr tool accessing the internet at the time of install like Adobe AIR, Adobe Media Player or Flash...
cheers big ears.