Is my windows 7 genuine?

Left computer into a local shop because it would not switch on and seemed completely dead, they said motherboard needed replaced and recommended i upgrade to windows 7 (which only cost an extra 40£) since iv got it home at first it was crashing and going to bluescreen due to ntfs.sys error, after running scans and updates it seems to have stopped crashing now, I recently found heur.agent/gen-fakesas and win.32/opencandy viruses, (computer was clean of all issues the last time i checked, was reading that fake windows versions can sometimes pass verification tests and can contain viruses etc, windows is showing as verified on the website and on the computer but something doesn’t seem right.. is there any way to check if its really genuine?
Answer #1
No windows 7 sticker on the computer and no win7 software/box was given to me.
Answer #2
right click on My Computer -> Propetries ->scroll down
You will see the Microsoft windows geniues picture and also
Windows Activation————–
Windows is Activated
Product ID:XXXXXXXXXXXXXXXX
Answer #3
www.microsoft.com/genuine/validate/
Answer #4
The guy properly installed a pirated version of Windows 7 for you and activated it with Windows Loader that you could do it for free if you download it from here, to check if your Windows is activated go to Start -> Right click Computer -> Properties -> Scroll down to Windows Activation, if it says Windows is activated then it’s activated
Answer #5
MPZ replied: The guy properly installed a pirated version of Windows 7 for you and activated it with Windows Loader that you could do it for free if you download it from here, to check if your Windows is activated go to Start -> Right click Computer -> Properties -> Scroll down to Windows Activation, if it says Windows is activated then it's activated
But it will say that even if it has been activated with Windows Loader..
Answer #6
will is right
yes it will display