If you're confident your computer is safe then I might not be an issue.  The question is how confident are you that the computer wasn't infected before creating your wallet?  I've had a hot wallet on my main PC for years, and haven't had any issues.   But I'm extremely careful, and even more paranoid.

If you want a truly "cold" wallet, then the best approach is to take every precaution you can.  My favorite method is to use a machine with a newly installed, open-source OS (Ubuntu.)  Once the OS is set up the way I like it I will install Electrum, but before I create or restore a wallet I will disable all the networking hardware and USB ports in the bios, then lock the bios with a password.  Once I'm confident the machine is secure, only then will I restore or create a wallet.  The machine will never get connected to internet or any other computer again unless it gets purged first.  If I need to sign a transaction it will be transferred between my online machine and the off-line machine using cameras and QR codes.