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To free up a Primary partition, you can delete the 100mb System Reserved partition at any time using a 3rd party partition manager like free Partition Wizard bootable CD.
Then mark the Win7 partition Active using the PW CD.
Next boot the Win7 DVD, click through to recovery tools list and run Startup Repair up to 3 separate times with reboots to write the MBR to Win7 partition.
Most tech enthusiasts find an installer in their version of Win7 to clean reinstall using the license key stickered to the computer. This is the only real way to overcome the corruption the bloatware causes, even after uninstalling it.
You can unlock all versions in any installer by deleting the ei.cfg file in Sources folder, then recompile the ISO to burn to DVD: Bootable ISO - Create from Installation Files
Clean Install Windows 7