The "Recovery Partition" basically does the same as booting from a "System Repair Disc" for advanced startup options (WinRE). Both are not able to install Windows unlike installation media. Installation media include WinRE as well.

Usually it's not recommended to delete the Recovery Partition. I'm not familiar with using the Crucial Storage Executive program, so I don't know if shrinking the C drive or deleting the Recovery Partition will help for it. It would be best to create a new thread for that separate issue instead.