I decided to downgrade my computer from Windows 10 to Windows 8 today and was unable to re-install Windows 8 initially. Whenever I tried to install Windows 8, I kept running into the issue where I got the following error “We couldn’t create a new partition or locate an existing one. For more information, see the Setup log files.” After banging my head for a while, I came across a number of articles including this one which I took the steps from.
- Remove all drives from the computer. This includes hard disks, usb disks and also any PCI-E disks you might have
- Reboot the PC with the Win 8 CD in and select repair
- Head over to the advanced tools option
- Once in the command prompt Type the following:
DISKPART LIST DISK SELECT DISK <whatever disk number you have> CLEAN CREATE PARTITION PRIMARY ACTIVE FORMAT FS=NTFS QUICK ASSIGN LETTER=<whatever disk letter you want it to be>
- Repeat the steps above for all other Hard Disks present but don’t make any other disks active
- Reboot and start the installation again
I think I ran into this issue primarily because I also dual boot my machine between Ubuntu and Windows and Windows 8 doesn’t seem to like seeing a GRUB partition in existence.
This works with Windows 8