Bought used PC that has pirate Win 7. I want to install my own genuine Win 7 without losing any info, How can I do this please

[bigtel]

Used PC with fake Win 7 I want to install genuine Win 7 without losing my files but how? Terry

 

[techgeek]

From the Control Panel, click on the System icon.

At the bottom of this window you should see an option on the bottom right to Change Product Key. Click this and enter you new key and it should activate.

 

[Math Geek]

exactly what he said ^^^^

won't change anything but the key used to activate

 

[mahanddeem]

Hopefully not too late. I would not trust a previous pirated win installation. And by only putting a valid key you risk your key sent to a wrong place(trojan or backdoor)
I would fresh install win and use a genuine key.