I don't think your friend is right. A firewall only should care about Internet, not about running install programs. But it won't harm, if you disconnect from the Internet during this experiment: just pull out the cable or turn off the modem.
If you've got a separate firewall (Zonealarm, Kerio or another one) installed, you should know about it or see an icon in the System Notification Area (bottom right next to the clock). So I assume you don't have such a seperate program.
If you've got Windows XP SP2, go to Config Panel>Security Center. That's the easiest way to start it. Once you've found it, read http://www.tweakhound.com/xp/securitycenter/index.htm about the firewall options.
If you don't have Windows XP SP2 (but still SP1 or even the basic version) better update to SP2! http://www.microsoft.com/windowsxp/using/networking/learnmore/icf.mspx describes where to find your firewall until you do the update.
Hope this helps.
Hi everybody, since I cannot install the software for my webcam (gives the following error: "no acces to install shield ikernel.exe") neither the software for office 2003 (installation stops when a box pops up which says: "preparing office 2003 installation wizard")
a friend of mine told me it might help if I shut down my firewall.....but I cannot find it on my PC, can anybody tell me where to find it?? Would be highly appreciated!