Mountain Lion thinks my OSX HD is a Time machine
I have downloaded from AppStore "Mountain Lion" and start to uppgrade (install) from my Lion OSX, and i come to the screen where i chose my Lion HD where i have my "Everything" of files etc data programs etc.
But when i press the drive, the Mountain Lion installer says "Den här hårddisken används för Time Machine-säkerhetskopior" (in English : This hardrive is used for Time Machine backups", ans this it´s the hard drive that i don´t have like an Time Machine???
How do i "reset" so the Mountain Lion, "Thinks it´s a ordinary hard drive" ??? because it´s a ordinary drive, not any Time Machine Hard drive??!
Pleace help and give me the simplest possible way to uppgrade my computer.
Mac mini (Mid 2011), Mac OS X (10.7.3), overal Apple computers