a brute force hacking software for win7?

i didn't touch on my router for a long time and now i need to change some settings for my router, i still have access to it and can still link to the internet through it, but there is a setting that i did which i didn't do it well and now it's now causing me inconvenience to me now, so.... i need a software that can go and try out all the possible combinations, luckly, i didn't set a trail numbers so i can go on forever until it hits the password
i can't really press the reset button, i installed gargoyle router manager and i don't have the time to reinstall it; i setted a timer so that i may not over work over midnight, but now; i got a big project comming and i need to do it overnights
i use win7 X64; and it would be good if the programe can tell me the password that granted access.
please help me!