If you're not using the official ISO DVD Repair console then I have no confidence in any repairs including the Disk Check, which is why I urged you to wait until you have the official Win7 download and certainly not try using the unknown one which wasn't even downloaded fully. What is running DiskCheck now?
If the DVD Is not ready, then yes I would download and burn PW to CD/DVD, boot, post back pictures of the drive map and all listings. You can then use the steps I gave you in first post to mark Active and run Rebuild MBR from Disk tab:
We need to see a picture of your HD. Boot free
Partition Wizard bootable CD take a camera snap showing drive map and all listings, post back using paper clip in reply box. The 100mb System Reserved partition (preferred) or Win7 should be marked Active - if not rightclick to Modify>Set to Active. Then click on HD to highlight it, from Disk tab select Rebuild MBR, Apply, reboot. You can also check File System (Disk Check) with repair boxes checked.
This might start Win7 itself without the need to run Startup Repair from Win7 DVD.
You can also use PW CD to rightclick on each partition to Check File System with both boxes checked (full repairs), and Surface Scan the HD.
But first post back the camera snaps of listings and drive map which may reveal a lot.