2. Altering page files

The page files are one or more areas of your hard disks that Windows XP reserves as virtual memory. To put it simply, these reserved areas are used to contain any data that may spill over from your main memory.



Virtual memory is accessed by Windows just like physical memory, but is many times slower, due to the much slower speed of hard drive data transfer as compared to RAM. Windows XP actually uses the Page files continuously, regardless of the amount of free memory on your system, so optimizing these files can have a positive effect on the performance of your computer.

To optimize the page file(s), there are a few options you can consider.

Page File Placement:
Since Page files require intermittent disk access to write and retrieve information, putting them on the same drive as the operating system can compromise the performance of both. Of course, since most systems contain only a single hard drive, this is not usually something that can be changed. If your system contains more than one hard disk, consider placing a page file on the the non-OS disk and removing the one on the OS-disk containing the Windows files.

To do this: Right click on 'my computer' and select 'properties' then the 'advanced' tab. In the 'performance' section, click 'settings' then select the 'advanced' tab. In the 'virtual memory' section, click 'change.' From here you can choose individual drives and customize the size of the paging files you wish to create. See below for more info.

Page File Size:
By default, page files are created with a starting size and a maximum size. These values allow Windows to resize the paging file as system demand grows. It is more efficient to set an identical starting and maximum value so that no resources are wasted resizing the file.
To do this, choose 'custom size' for each page file and set the initial and maximum sizes to the same number.
As for what size to set them at, the best bet is to leave them at, or slightly below the default 'maximum' setting the system assigned, with a ceiling of 1GB. This is the amount of space that is reserved for the file, regardless of its current size. If you are creating multiple page files, split the amount between them.

3. Clean out the prefetch folder

Windows XP uses a system called 'prefetch' to organize and preload some of the data necessary for commonly used applications and files. A folder called prefetch is used to store the information the operating system needs to carry out this operation. After several months of use, the prefetch folder may become quite overloaded with older references to software and files that may no longer be in use.
It's a good idea to manually empty the older files out of the prefetch folder every few months or so. To do this: Navigate to 'c:\windows\prefetch' and delete all .PF files that are older than a week or two.

4. Set priority for individual programs

If you regularly multi-task while you are working at your computer, but some of the applications you use require more horsepower than others to work effectively (for example using Adobe Photoshop along with Word or other less demanding programs), you may want to consider setting a custom priority for the high-demand applications.
Priority is how the operating system determines how to share the processor time among applications. Most applications default to the 'normal' priority, so by setting your high demand application higher, you can increase its performance when multitasking.
To do this: Load the program you wish to change the priority for and press CTRL+ALT+DEL to bring up the Task Manager. Select the applications tab and highlight your program. Right click the program and select 'go to process.' Now right click on the highlighted process and choose 'set priority.'
The higher you set the priority above normal, the more CPU time the program will steal from other applications when you are multitasking.