i got some serious problems installing flash player on windows, please help?

i got windows 7 but using a safari browser cause none of the other browsers work on my computer, and i have flash player 11 installed but thats just way to outdatet since most of the websites i use require a newer version. so i was wondering if anyone knew how to fix this little problem of mine, i have tried all the things on adobes support site but nothing seems to help, please help me ?