7. Turn off filesharing when not in use. XP SP2 does so by default; you can double-check by choosing Control Panel, Windows Firewall, Exceptions and making sure File and Printer Sharing isn’t ticked. In Vista, choose Change Settings in Windows Firewall, select Exceptions and do the same thing.
8. Turn your wireless card off when not in use. There may be a physical switch, or you can turn it off in XP by right-clicking the wireless icon in the Taskbar and choosing Disable. Select ‘Manage wireless networks’ in Vista’s Network and Sharing Center, right-click the wireless network icon and choose Disable.
9. Be wary of allowing your browser to remember your details for future use. What’s convenient for you could be very convenient for a laptop thief. To delete cookies in Internet Explorer, choose Tools, Internet Options, General. Then, under Cookies, click Delete. Choose Yes to confirm, Close, then ok.