This is an excellent .pdf file sent in by moonboy and created by Daniel Keller, TASCAM Sr. Product Specialist !
It covers tons of important tips and tweaks as well as many guides.
"Windows defaults to continual logging of Input and Output data to your hard drive.
Disabling this will free up some resources. To disable performance logging, go to the
Start menu and select Run. Type in diskperf -n and hit Okay.
Write Behind Caching
Windows defaults to write-behind caching, holding data in a memory buffer before
writing it to disk. Disabling this function will increase your system performance by writing
data immediately to disk. To disable this function, right click on My Computer and
choose Properties, or open Control Panel and select System. Select the Hardware tab
and click the Device Manager button. Click the 'plus' sign next to Disk Drives and select
a drive. Choose Properties and uncheck 'Write Cache Enabled'. Repeat for all drives in
your system."
Download: OptimizeXP2k.zip (.pdf format)
http://www.xp-erience.org/out/misc/OptimizeXP2k.zip