New
#41
When I'd just given you the steps to Convert C then Resize to add as many adjacent Logical partitions as you want, why did you not do that but instead delete your OEM tools partition?
Yes you can still rightclick C to convert it to Logical but there's no reason to do that now since you already destroyed bootable diagnostics by not following the steps given.
If you have not made your Recovery disks yet then I'd do that now. You can normally run them to reinstall all of the factory partitions to default. Or you can run Minimized Recovery from it's partition at boot to get close to the superior Clean Reinstall - Factory OEM Windows 7 and lose the worst load of factory bloatware in the industry.