I've searched through some answers here, and while one was marked as a duplicate, it specifically dealt with an apt upgrade, so I don't think it applies to my question.
Currently I have 12.10 on my machine sitting next to Windows 7. Upgrading to 13.04 via the software updater doesn't seem to work--it gets hung up on some packages and then reverts and quits out of the upgrader. I burned an .iso image and thought to upgrade with that. When I use it, though, my only options are to wipe the drive entirely or place the upgrade next to the "other OS's" the upgrader detects. I chose the latter, hoping it would replace 12.10 and upgrade to 13.04. Not so. Now I have 12.10 and 13.04 on the same machine.
How can I delete these partitions and run a clean install while keeping windows 7 on the drive? I know I can use Gparted, but don't know if I should use the format option on the ext and linux-swap and format to NTFS or to somehow just delete these entirely (is there a Gparted option for that?) Any help would be greatly appreciated.