03-09-2009, 12:07 PM
Join Date: Jun 2008
Level: 2 
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You can use a keylogger. Another way to look for(Although looking for the History in IE, but most likely it'd be removed. But it's best to check)is looking at the list of sites that the computer has connected to.
In Windows, there's a hidden utility (in command line) called netstat.
To get this, go to Command Prompt(either Windows Key+R>cmd or Start>Programs(or All Programs, for Windows XP)>Accessories>Command Prompt). You should see a black box pop out. In the black box, type in netstat (no parameters). You will see the list of connections of sites that the computer has made with. Often, web browsers will use port 80(HTTP) or 23(FTP). To get the IP addresses of the sites and exact port number, type in netstat -n.