Flash player crashes my computer when used . . . please help!

the newest versions of flash player required for use in you tube and hulu crash my computer and causes it to reboot. I'm using windows xp home edition 32 bit, have updated my drivers, and have tried to use several different versions of the flash player 10( installing the other versions first), as well as trying to use it in internet explorer 8, firefox 5, and google chrome. The computer does not crash unless the flash player is in use. I have tried everything I can think of, to no avail. This problem did not happen UNTIL I was forced to udate the flash player to the latest version in order to watch Hulu and you tube due to their requirements. PLEASE HELP!