1. It boasts how long it can stay up. Go to the Command Prompt in the Accessories menu from the All Programs start button option, and then type â€™systeminfoâ€™. The computer will produce a lot of useful info, including the uptime. If you want to keep these, type â€™systeminfo > info.txtâ€™. This creates a file called info.txt you can look at later with Notepad. (Professional Edition only).2. You can delete files immediately, without having them move to the Recycle Bin first. Go to the Start menu, select Runâ€¦ and type â€˜gpedit.mscâ€™; then select User Configuration, Administrative Templates, Windows Components, Windows Explorer and find the Do not move deleted files to the Recycle Bin setting. Set it. Poking around in gpedit will reveal a great many interface and system options, but take care â€” some may stop your computer behaving as you wish. (Professional Edition only).3. You can lock your XP workstation with two clicks of the mouse. Create a new shortcut on your desktop using a right mouse click, and enter â€˜rundll32.exe user32.dll,LockWorkStationâ€™ in the location field. Give the shortcut a name you like. Thatâ€™s it â€” just double click on it and your computer will be locked. And if thatâ€™s not easy enough, Windows key + L will do the same.4. XP hides some system software you might want to remove, such as Windows Messenger, but you can make it show everything. Using Notepad or Edit, edit the text file /windows/inf/sysoc.inf, search for the word â€˜hideâ€™ and remove it. You can then go to the Add or Remove Programs in the Control Panel, select Add/Remove Windows Components and there will be the software and you can now uninstall it.5. For those skilled in the art of DOS batch files, XP has a number of interesting new commands. These include â€˜eventcreateâ€™ and â€˜eventtriggersâ€™ for creating and watching system events, â€˜typeperfâ€™ for monitoring performance of various subsystems, and â€™schtasksâ€™ for handling scheduled tasks. As usual, typing the command name followed by /? will give a list of options.6. XP has IP version 6 support â€” the next generation of IP. Unfortunately this is more than your ISP has, so you can only experiment with this on your LAN. Type â€˜ipv6 installâ€™ into Runâ€¦ (itâ€™s OK, it wonâ€™t ruin your existing network setup) and then â€˜ipv6 /?â€™ at the command line to find out more. If you donâ€™t know what IPv6 is, donâ€™t worry.7. You can at last get rid of tasks on the computer from the command line by using â€˜taskkill /pidâ€™ and the task number, or just â€˜tskillâ€™ and the process number. Find that out by typing â€˜tasklistâ€™, which will also tell you a lot about whatâ€™s going on in your system.8. XP will treat Zip files like folders, which is nice if youâ€™ve got a fast machine. On slower machines, you can make XP leave zip files alone by typing â€˜regsvr32 /u zipfldr.dllâ€™ at the command line. If you change your mind later, you can change things back by typing â€˜regsvr32 zipfldr.dllâ€™.9. XP has ClearType â€” Microsoftâ€™s anti-aliasing font display technology â€” but doesnâ€™t have it enabled by default. Itâ€™s well worth trying, especially if you were there for DOS and all those years of staring at a screen have given you the eyes of an astigmatic bat. To enable ClearType, right click on the desktop, select Properties, Appearance, Effects, select ClearType from the second drop-down menu and enable the selection. Expect best results on laptop displays. If you want to use ClearType on the Welcome login screen as well, set the registry entry HKEY_USERS/.DEFAULT/Control Panel/Desktop/FontSmoothingType to 2.10. You can use Remote Assistance to help a friend whoâ€™s using network address translation (NAT) on a home network, but not automatically. Get your pal to email you a Remote Assistance invitation and edit the file. Under the RCTICKET attribute will be a NAT IP address, like 192.168.1.10. Replace this with your friendâ€™s real IP address â€” they can find this out by going to www.whatismyip.com â€” and get them to make sure that theyâ€™ve got port 3389 open on their firewall and forwarded to the errant computer.11. You can run a program as a different user without logging out and back in again. Right click the icon, select Run Asâ€¦ and enter the user name and password you want to use. This only applies for that run. The trick is particularly useful if you need to have administrative permissions to install a program, which many require. Note that you can have some fun by running programs multiple times on the same system as different users, but this can have unforeseen effects.12. Windows XP can be very insistent about you checking for auto updates, registering a Passport, using Windows Messenger and so on. After a while, the nagging goes away, but if you feel you might go insane before that point, run Regedit, go to HKEY_CURRENT_USER/Software/Microsoft/Windows/Current Version/Explorer/Advanced and create a DWORD value called EnableBalloonTips with a value of 0.13. You can start up without needing to enter a user name or password. Select Runâ€¦ from the start menu and type â€˜control userpasswords2â€², which will open the user accounts application. On the Users tab, clear the box for Users Must Enter A User Name And Password To Use This Computer, and click on OK. An Automatically Log On dialog box will appear; enter the user name and password for the account you want to use.14. Internet Explorer 6 will automatically delete temporary files, but only if you tell it to. Start the browser, select Tools / Internet Optionsâ€¦ and Advanced, go down to the Security area and check the box to Empty Temporary Internet Files folder when browser is closed.15. XP comes with a free Network Activity Light, just in case you canâ€™t see the LEDs twinkle on your network card. Right click on My Network Places on the desktop, then select Properties. Right click on the description for your LAN or dial-up connection, select Properties, then check the Show icon in notification area when connected box. Youâ€™ll now see a tiny network icon on the right of your task bar that glimmers nicely during network traffic.16. The Start Menu can be leisurely when it decides to appear, but you can speed things along by changing the registry entry HKEY_CURRENT_USER/Control Panel/Desktop/MenuShowDelay from the default 400 to something a little snappier. Like 0.17. You can rename loads of files at once in Windows Explorer. Highlight a set of files in a window, then right click on one and rename it. All the other files will be renamed to that name, with individual numbers in brackets to distinguish them. Also, in a folder you can arrange icons in alphabetised groups by View, Arrange Icon Byâ€¦ Show In Groups.18. Windows Media Player will display the cover art for albums as it plays the tracks â€” if it found the picture on the Internet when you copied the tracks from the CD. If it didnâ€™t, or if you have lots of pre-WMP music files, you can put your own copy of the cover art in the same directory as the tracks. Just call it folder.jpg and Windows Media Player will pick it up and display it.19. Windows key + Break brings up the System Properties dialogue box; Windows key + D brings up the desktop; Windows key + Tab moves through the taskbar buttons.20. Windows XP secretly KNOWS that the average user has no idea what they are doing. Therefore, it doesnâ€™t let you do really stupid things like deleting the windows directory (at least not without spending several hours convincing it that you REALLY want to do this). Oh yeah, and internet explorer kinda sucks, get Firefox.