Windows firewall is too weak to be taken seriously. You do need a two-way protection and all non-Windows firewalls do it.
In my opinion ZA is a great choice (easiest to setup and great protection), so long as you go for older version and not the currently distributed version 7. V7 is bloated with stuff you can't use, and causes problems with Outlook and possibly other problems. The version I'd suggest is 6.1 or 6.5. I prefer 6.1.
Considering you're both using Linksys router, you don't have to do any internet connection sharing, therefore it's simple. I had some minor problem with 6.5 free.
Please go herehttp://download.zonelabs.com/bin/free/info...aseHistory.html
Besides downloading ZA free setup file, also download the manual, unfortunately I can't find the link, but it should be somewhere on the ZL site. Using the manual, get oriented what it's all about. When you install, read and answer questions, but usually taking defaults is simplest. If you have any connection problems, post back.
If you ever want to share documents with your Mom, just follow standard Windows instructions for setting up home network and for setting up specific folders to share. Otherwise you're totally independent and invisible to one another.
Edit - I still can't find the manual, but here's a link to zones setuphttp://www.zonealarm.com/store/content/sup...mp;lid=zasupp_o
And actually you don't even need it because ZA will detect the network (your router IP address and subnet) and during installation, or after, you can place it in the trusted zone if you need to go into the router for editing settings.
Edited by tos226, 27 May 2007 - 04:08 PM.