How do I know for sure if on ten or 8?

[HotRod1975]

I was on 8 then had issues with processor they gave me another unit same as the other I don't know were to check the OS thanks

 

[Guytronic]

Left click on Windows start.
Click on "system" from the pop-up menu.

Welcome to the forums by the way...

 

[HotRod1975]

Thanks I had windows 8 it had reg start on it or the box on it now I cant get to set to reg start button rither then the 4 box on it

 

[HotRod1975]

says win 8.1 thought I saw ten when it booted up hmmm