Will using Parallel Desktop create viruses on Mac?

I have a Macbook Pro, and I really like everything about it. There's one thing, though...well, one and a half that i really want and need on the mac. Microsoft Word works better (for me) on Windows version. There's nothing wrong with the Mac version, I just like Windows version better. So I wanted to download Parallel Desktop to use Windows version.
There's a computer drawing program called Paint Tool Sai only for Windows, and I want to download that.
There's also a game or two I like that I might want to play on the mac, but it would have to be on a windows.
This game that I really want to download? It made my Windows PC crash and break down. My mom has made some adjustments and fixing, and it works somewhat, but it's super slow and it turns off randomly sometimes out of nowhere. It's not good at all.
But I still want the game, you know?
So I was wondering if I can download parallel desktop, run Microsoft word and maybe Microsoft power point on windows (on the mac), draw on the computer, and also play 3D games on windows (on mac). I won't be using the windows version except for those three things. I won't go on the internet a lot, I'll just play a few games, draw digitally, and type up my documents.
Will this affect my mac at all? The only thing I'm worried about is the mac. If the windows crashes and won't work, will this be the same problem with the mac?
I've researched, and it looks like it won't affect it a whole lot, just rarely, but I'm still worried...Paint Tool Sai is a huge program, and the 3D game is also pretty big. If you were wondering, the game is called Grand Chase-super fun, action-packed, and i love it. Number one 3D game ever. Big time. But it uses internet, and blabbity blab, and it made my other computer crash and break down and ya.
Plz help!! Thank you!
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If your Windows virtulal machine crashes - it won't affect your Mac at all. Cause the virtual machine is just a branch of file stored on your Mac - and if it becomes corrupted - the Operating System on your Mac would be still functional with no harm from the corruption.

As per your situation - Parallels Desktop has been designed specifically for your case - when you need to run only Windows compatible application but stick to your Mac. You may probably want to improve your Virtual Machine performance - i suggest reinstall virtual machine. Just create new one and install Windows from the scratch