so this problem didn't occur when i was still on vista, but after switching the os to windows 7, after installing the software/drivers for my wireless mouse my touchpad stays "on"

it's not too big of a problem, but it's annoying and i'm pretty ocd with my computer. it's a microsoft explorer mouse and just works with the usb. i don't remember exactly where/how i found out on vista, but i remember it showing that the touchpad turned off when the usb was in, but now on 7 i can't find anything related to the touchpad. looked at troubleshooting and 'help' stuff on microsoft's website but didn't find anything...

how do i turn my touchpad off when the mouse is plugged in??