Yeah.. switch to other windows OS or get new computer
It's not just IP but your xuid is blocked too, maybe try change your mac address? I never get banned so i don't know how to solve your problem.
Here are tips not to get banned:
1. Always hosting.
2. Turn off killcam: scr_game_allowkillcam 0.
3. Run littleservertool & change your name to blank/empty, your name will be invisible in lobby & scoreboard.
4. Hack away lol.