I'm troubleshooting an issue that may or may not be related to the latest Windows 10 Fall Creators Update. I don't recall when exactly I upgraded. Is there a log or cmdlet I can run that will tell me how long I've been on the current version of Windows 10?
You will press the Windows Flag key one time and then start typing in "Windows Update Settings" until you see Windows Update Settings appears at which point you will click on that to open up the options.
From the Windows Update screen you will then select the View installed update history option.
From the View installed update history screen you will see the date the Feature Updates and the date those were installed.