How to clear cache, cookies, history, auto complete and passwords in Internet Explorer
February 18th, 2007 
Temporary Internet files or cache is folder with copies of all web pages you visited, including images, sounds and cookies. Cache makes Internet browsing faster because browser can display files from cache instead of downloading them. If cache grows to big, it can have negative affect on browsing speed and can make IE act sluggish. If you are concerned about your privacy you should delete cookies, history, auto complete and passwords from time to time.
If you have lots of programs open at the same time you will like this tool. Standard Alt-Tab window shows only application icon. When you have multiple windows of the same application open, it can be hard to find correct one. Microsoft PowerToy Task Switch can replace standard Alt-Tab view with one that not only shows application icon, but also preview (screenshot) of an application window.
One of Windows XP features is error reporting when application or system crashes. It offers to send error report to Microsoft. You might want to disable this feature if you don’t want to have information about your system sent to Microsoft, or if your computer is not connected to the Internet. You can disable this feature, or you can limit it to Windows operating system errors or only to specific programs you choose.
While you are using your computer, files on your hard disk are becoming more and more fragmented. This happens because while saving files, system is trying to fill empty spaces. One file can bi split up in many parts around your hard drive. This slows down file access, system is starting up slower and everything becomes more sluggish.
There is a bug in MS Windows that can slow up network browsing. It can take up to 30 seconds to browse remote computer. Reason of this delay is that Windows is scanning remote computer for Scheduled tasks.
Control Panel applet in Windows operating system allows user to change system settings, software and hardware settings, adding and removing software, changing users permisions, and many more.
The Registry is a system database where Windows operating system and other software keep their settings. Registry Editor is a program that edits that database.
ClearType is Microsoft technology that improves font display on color LCDs. It does that by using RGB subpixels to antialias font edges.
You can make blue screen of death with few clicks. You might want to do this as a prank 
, or you need to save memory dump, or test your application if you are a developer. Microsoft included simple way to do this, you only need to enable it first.