1. Use 'whole system' 
performance benchmarks 
Artificial 
benchmarking programs are a great way to see the relative performance increase 
that your tweaks and changes have achieved. Running a benchmark before and after 
a prospective change will give you a good idea of where you stand.        
Several companies produce 'whole system benchmarks' 
designed to stress test every area of your PC's performance and give you a 
result which you can use as a benchmark for improving your system's speed. 
   Try 
PCMark 2004 by Futuremark, SiSoftware's Sandra 2004 and 
Veritest's Winbench 99. In addition to 
benchmarking, these applications can also provide valuable information about 
your PC and its configuration. 
2. 
Tweak insurance part 1: backing up and editing the registry   
Several of the performance tweaks in this guide 
require you to edit the Windows registry, which can be extremely hazardous to 
the health of your operating system unless it is done carefully. Editing the 
registry opens up a world of possibilities for tweaking WindowsXP that would 
otherwise be unavailable, but it also offers you the ability to completely mess 
up your system in the time it takes to reboot...
 For this reason, we strongly recommend that 
you back up your registry to a file before attempting any of the 
registry-related tips in this guide. 
To back up the entire registry, open REGEDIT 
and ensure that 'my computer' is highlighted, then go to file\export.             
    
In this window, you need to enter a 
location to save the exported registry (as a single file) and choose the type of 
file to create. Also, check the 'all' button at the bottom of the screen 
to backup the entire registry.       

There are several possible file types, 
but we will focus on one only, as the ".reg" file type is the easiest to 
use. A .reg backup will copy over all changes made to existing portions of 
the registry when it is restored, while leaving additions to the registry made 
since the backup untouched.    
         
      Select the .reg file type and click 
'save.'
Restoring the registry from this .reg file is a 
simple matter of locating the file you created, right clicking it and selecting 
'merge.' 
All registry related tips in this 
guide use the REGEDIT program which can be accessed from the run command 
('start\run') by typing 'regedit'.              
        
3. Tweak Insurance part 
2: Creating a system restore point  
           
One of Windows XP's brand new features is the 
System Restore utility, an update of the registry rollback tool first seen in 
Windows ME. The program has been considerably enhanced since these humble 
beginnings, and is a very useful safety tool. It uses 'restore points' which are 
snapshots of your registry and system condition at a specific time. The points 
are stored on disk and can be used to effectively move your PC back through time 
to a previous condition. 
As you can imagine, this utility comes in quite 
handy for heavy-duty tweaking (though it wastes a LOT of disk space by default, 
more on this later), acting as a safety net. 
To create a restore point:
Go to 'start/all 
programs/accessories/system tools/system restore.'
   
 Click 'create a restore point.'
    
Give your restore point a name and 
click 'ok.' 
That's all. To restore your 
system to its previous condition, fire up system restore again and select 
'restore my system to an earlier time.' You will be presented with a 
calendar view of all current restore points. Windows creates them automatically 
by default under certain conditions such as program installs. Choose the 
one you created, click 'next' and follow the instructions.   
 
Now, as for 
the amount of drive space that System Restore eats up, we have a 
tweak for that next!