You can store your ETH & ETC on your Trezor via MyEtherWallet. You can even print paper wallets from MEW.
I personally don't buy into the whole 'anti-virus' software scam. That's like putting a virus on your system and hoping it will catch a different and newer one that you hope got caught in its last annoying update. And paying for the system hit and inconvenience. My strategy is to access crypto from a PC that doesn't ever go to dodgy websites or access gmail etc. Use a tablet or something for your pron, right?