Can I reinstall windows 7 Professional on optiplex 380?

I buy optiplex 380 2nd hand pc seller. This pc has Windows 7 Pro COA, but the installed operating system is Windows 7 Ultimate. The recovery partition was missing and I have no recovery disk. Where can I download windows 7 pro to reinstall this pc? Sorry for my bad English

You can download an .iso Windows 10 RS1 and performing a new installation:

http://dellwindowsreinstallationguide.com/download-Windows-10-OEM-and-retail-ISO/

Tags: Dell Software

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