Simple way to Speed Up XP Boot-up

                                                                One of the main causes of XP booting slowly is the method of loading drivers. Windows versions prior to XP loaded drivers sequentially, but since XP, it has been done concurrently, causing a slowdown.This information is written to the file C:\WINDOWS\Prefetch\Layout.ini.
While creating this file, XP does a partial defragmentation of the files listed in Layout.ini to make them available in one contiguous area of the hard drive, allowing to load them faster.Various factors adversely affect this defragmentation process, such as a fragmented hard drive, improper defragmentation of the above files by the regular Defragmenter, etc. It is therefore necessary to do this defragmentation manually using a utility from Microsoft known as BootVis, available at Extract the ZIP file and run BootVis.exe (very preferably after defragmenting your hard disk).
                                                                  The first step in tweaking or troubleshooting your boot process is to run a boot trace. Go to File > New > Next Boot + Drivers Trace. The Trace Repetitions window will prompt you for the number of repetitions (reboots and traces) to run. Let’s go with the defaults;
click OK. BootVis Cancel the reboot if you need to save your work, then reboot.
                                                                 After XP reboots, BootVis restarts automatically and provides individual graphs for the system activity areas such as Boot Activity, CPU usage, Disk I/O, Disk utilisation, etc. Armed with this indication of how well the boot process is going, you can optimise the system. Select Trace > Optimize System. Again, BootVis will present you with a 10-second countdown before rebooting.                                                   When the system reboots, the BootVis window will appear,
indicating that BootVis is using information gained from the previous boot and the current boot to optimise the system. When the next window appears, BootVis places the files specified in the layout.ini file in the area of contiguous disk space created during the defragmentation you did prior to running BootVis. If you have a really old installation of Windows, we’d recommend running the above procedure again or setting BootVis
to repeat for two or three times.