Arrived within the specified time. I had an Enterprise version of WIndows 7 from when working with a previous employer. Using the Win 7 Professional 64bit disc I was able to downgrade my Enterprise version (using Windows 7 downgrader) to Professional, then entered the COA that came with the disc and then upgraded to Windows 10. I purchased the Professional version as opposed the Ultimate version of Win 7 as both upgrade you to Win 10 Pro but Ultimate was a little bit more expensive I believe. Overall very pleased with the price and the service. Highly recommend.