If you are not willing to change the OS you use to something safer like Linux, and it seems you do not as you specified that you wanted a wallet that works with Windows, then you need to get a hardware wallet, hardware wallets are ideal for someone like you that is using an insecure OS like Windows but still want to secure their coins to the best of their abilities, with Ledger and Trezor being the two most popular options in the market of hardware wallets.