First, install new Windows 10 with lastest version from Microsoft to make sure your Windows is clean.
After that go to these webiste:
Bitcoin paperwallet.com: This will help you print both front and back side.
Bitcoin.com recommends the users to download the source code and generate the seed from an offline laptop.
Wallet Generator.net: This you have to download it from GitHub and open the index.html file from your computer to protect your funds from being stolen.
Then, write your Private Key out. I'm sure your wallet safe 100%.
It is a simple and free way.