Administrator password

Hello,pls i have a big problem.i downloaded avira web protector on my pc and i mistakenly deleted the program on my desktop and i have forgotten my administrating password and i want to uninstall it but it is asking for the password and i cant access my web browsers because if i try to visit any site i will only visit avira license error page pls how can i recover the administrator password or how can i make my web brower7 to not be protected by the web protector.