if you want to be even safer since windows isn't very safe to begin with, considering 90% of all viruses exist for windows as well as windows 10 being a spyware station,
you should consider a hardware wallet - or at the very least, using a secondary OS for the crypto stuff.
I wrote some about it here:
https://bitcointalk.org/index.php?topic=3576100This. Especially knowing that you're running Windows 7. If you're planning on running a wallet on Windows, at least use Windows 10 with the latest security updates. I think they don't even roll security updates on Windows 7 now(I think).
In a security perspective, running on your Android/iOS device is more preferable. Probably unless you like downloading and installing random app .apk's from shady sites on your Android device. But hey, if you want to continue anyway, Electrum[1] as suggested by previous replies.
[1]
https://electrum.org/