CLIPBOOK, enable the "Clipboard Viewer" and share it with remote computers. If this service is stopped, the Clipboard Viewer will not be able to share information with the remote computer. If it is not prepared to use the remote desktop, this service is completely disabled. Error Reporting Service, service and applications allow error reports when running in non-standard environments. This service can be set to manually or prohibited. If you want to make a more detailed settings for the error report, right-click on my computer icon, select Properties, click the Error Report button below the Advanced tab, where you can think if you send an error report and how to send it. And for those who don't have access to the Internet can directly disable this service. There is a small suggestion here, that is, if you use a broadband Internet access, it is best to start this service. Because sometimes after you submit an error report, the program will feed back to your correct solution. I have got a solution after submitting the report and solved the problem smoothly. And if you are worried about this report will go to Microsoft to leak your private information (should not happen, at least Microsoft said this), then you can disable this service. Fast User Switching Compatibility, is managed for applications that need assistance under multi users. Switching users are a new feature provided by Windows XP, which allows for fast switching between users on a computer without an add to the domain. If you think you don't need this feature, or there is no multiple users on your computer, you can disable this service, or set the start type as manual. However, before disabling this service, you must first disable the user switching function at the control panel - user account. Human Interface Device Access, enable universal input access to the Smart Interface Device (HID), activates and saves the keyboard, remote control, and predefined hot buttons on other multimedia devices. If you have an ergonomic standard (mainly refer to keyboard and mouse), then this service is preferably set to automatic, otherwise some of these devices will not be used normally. And if you don't have such a device or your device has your own driver, you can disable this service. Imapi CD-Burning COM Service, managing CD recording with Image Mastering Applications Programming Interface (IMAPI). This service provides Windows XP CD burn function, but it is believed that no one will use this feature, and we have fun more easily use more simple third-party burn software. So disable it. Indexing Service, the index content and properties of the file on the local and remote computers; quick access is available through flexible query language. This service doesn't seem to have much use for personal users, while it will cause the system to extremely busy after the enabled. Performance, through the task manager, you can see that Cidaemon.exe occupies most of the CPU resources. If this is this, you can disable this service. Internet Connection FireWall (ICF) / Internet Connection Sharing (ICS) provides network address translation, addressing, and / or prevention of intrusion services for home or small office networks. If you need to use the Internet connection sharing and firewall feature built by Windows XP, you need to keep this service automatically run, otherwise you can be disabled. Print Spooler loads files into memory for later printing. If you don't have a printer (local or on the network), you can disable this service. Remote Registry enables remote users to modify registry settings on this computer. For us general users, it is best to disable this service.