[you must download the genuine version of Electrum & store it in usb stick. Also scan it with your latest anti-virus]
1. Disconnect internet from your Laptop/PC
2. Format all hard drives
3. Install windows again
4. Never connect internet
5. Install Electrum & use to generate your address.
6. Back up your seed, private key & password in a printed paper. Store it in your Bank vault.
7. uninstall Electrum
8. Format all hard drives
9. Install windows again
10. set internet connection again
dude you shouldn't be using Windows to create paper wallets. a much easier and secure way of doing what you just said is to download Tails OS and run it from USB or DVD (it already has Electrum installed). no need for you to keep installing windows.