How do I uninstall Tekkit?

[Solarman]

like the title says

[Adlersch]

Going to assume by Tekkit you mean the Technic Pack. If so...

On Windows 7 (Maybe Windows XP) go to C:>Users>(Your name)>AppData>Roaming

Then delete .technic

Then go delete the launcher from your desktop or wherever you are keeping it. The launcher is not a shortcut, so if you want the Technic Pack gone for good, delete that too. If you don't, though, you can always run the launcher again and it'll reinstall .technic and whichever modpacks you play.

HOWEVER

If you only want to delete Tekkit, you'll have to go from Roaming>.technic>(Name of the pack you want deleted) and delete that.