Yes, there are many many security holes in Windows 3.1/9X which allows your system to be compromised while you are online on the Internet as in file manipulation and even crashing your computer from remote. What can you do about it ? Check out some of the websites that I have below and get a copy of some personal firewall software. There are internet websites which will test your computers security for you while you are online and others which will explain weakness in Windows Networking/Dialup Access... Gibson Research - www.grc.com (Will Test your systems security) World of Windows Networking - www.helmig.com (Everything about Windows Networking, etc.) Zonelabs - www.zonelabs.com (Free personal firewall software) Black ICE - (Another personal firewall software but not free)