How do I find the install time and date of Windows?

Question

This might sound like a little bit of a crazy question, but how can I find out (hopefully via an API/registry key) the install time and date of Windows?

The best I c

Answer 1

We have enough answers here but I want to put my 5 cents.

I have Windows 10 installed on 10/30/2015 and Creators Update installed on 04/14/2017 on top of my previous installation. All of the methods described in the answers before mine gives me the date of the Creators Update installation.

I've managed to find few files` date of creation which matches the real (clean) installation date of my Windows 10:

• in C:\Windows

• in C:\