The right answer is that so many failed setups screwed up my disk:
Thanks to Google and ReaperFighter I'm good to go:
Reboot the PC with the Server 2012 R2 image (or whatever bootable image (windows 7, 8, etc.) you have) and select Repair Computer
Click on Advanced tools and then get to a Command Prompt.
Once at the command prompt Type Diskpart
Type LIST DISK
Type SELECT DISK <whatever disk number you have>
Type CLEAN
Type CREATE PARTITION PRIMARY
Type ACTIVE
Type FORMAT FS=NTFS QUICK
Type ASSIGN
perform the above for any other hdds present, but don't make any other drive active of course.
Now reboot and start in the installation over again. You should be good to go :)
-ReaperFighter
I am installing as we speak...