Q: Viruses, windows, and parallel 6 -?-

You need anti virus software for Windows. Microsoft Security Essentials is free and is all you need. http://windows.microsoft.com/en-US/windows/products/security-essentials

abufarouk wrote:

 

If I install windows using the program, but don't download any anti-virus software, and I only use internet using the mac system, will the computer be at risk from viruses?

You are always "at risk", but under this configuration, your risk is very, very low.

Or, if I do use internet using windows, do I need to get anti-virus software for mac as well as PC? Or can I just get it for PC?

You do not need antivirus for the Mac under any circumstances. The more you use Windows for internet activity, the more likely you will be to need antivirus.