How to know os installation date

[Guest]

Hello,how to know os installation date pls help me

 

[hang-the-9]

Click Start. Type in CMD hit Enter. In the dos window type in systeminfo, click Enter.
Scroll up to the top, there will be a field in there called "original install date".

 

[niceprasanth]

systeminfo.exe

 

[wisho0]

systeminfo.exe