Problem: Error message “Setup was unable to create a new system partition or locate an existing system partition.”
What to try:
Make sure that the partition is primary, active, and formatted with NTFS.
Wow! Great thread Jonathan! I too suffered from the "Setup was unable to create a new system partition...."
I have a P7P55D Deluxe mobo from ASUS
WD Caviar 1 TB HDD X 2, RAID-1
WIN 7-64 OS, OEM
I first installed the WIN 7 over my RAID-1 configuration. So far so good. Then I tried installing a Linksys WUSB54GC USB wireless adapter so I could download updates to my new rig.
This is when WIN 7 started acting up. It wouldn't shutdown and when it did there was the BSOD. Impatiently I shut it down "hard" and on reboot it wouldn't launch windows, it just went to a black screen and stayed there.
Since this was a clean install on a new rig, I decided to delete everything and restart from scratch. At the Where do you want to install? screen I selected my RAID drive and chose Format from the menu. Big Mistake! After selecting my RAID drive, when I clicked Next I got the "Setup was unable to create a new system partition or locate an existing system partition. Please view the logs for more information" message.
This had me stymied so I began my search for a solution (google is your friend!) and landed here. However, there were other suggestions from other forums and long-story, short: what worked for me was to remove the battery from the mobo for 10-minutes. And then reinsert the battery, insert the WIN 7 x 64 install DVD and start over. At boot, I then entered the BIOS and changed the default storage config from IDE to RAID and then pressed [CTRL +I] when prompted to acces the RAID config screen and selected RAID-1. When I got to the Where do you want to install screen, I created a 30 GB partition, loaded my Intel RAID driver from USB Flash drive and then proceeded to allow WIN 7 to install with no further interruption!
I would recommend adding the 10-minute battery removal procedure as a first step in the What to try section.
This forum is a Great resource! Thanks for posting Jonathan!
EDITED: to add - I also made sure that my DVD RW was the first boot sequence followed by the RAID drive. In the end I'm not sure which "tweak" made it all work, but if you try the battery removal procedure, make sure you sequence your Boot properly in the BIOS before attempting to reinstall WIN 7 x64