I have been asked by management to investigate staff Internet use, to make sure no inappropriate sites are visited and that all Internet use is work-related. This will be per-username, as users don't necessarily use the same workstation each time.
Without installing additional software, I'd like a list of every website each user visits (i.e. a separate list for each user) to be stored somewhere accessible to IT administrators (preferably on the server, if this won't slow down the loading of websites), for up to 30 days.
[We are running Windows XP Pro on workstations connected to a Windows 2003 file server. I have used the term "Internet" broadly here - I'm referring to http access via Internet Explorer; we can leave Telnet, FTP et al. alone for now!]