Quantity of RAM
The quantity of RAM can also be important. Windows XP isn't that proficient at running on 256M PC and Windows 2000 has got the edge. Windows XP is much more resource hungry as well as on a 256K PC it feels as though it's in a snails pace. 512K is generally okay and when you are running 2G, only a tiny bit of this memory can be used unless of course you take some major memory hog programs. A great compromise could be most likely 1G between cost and speed for modern desktop computers and laptops with XP.
Spy ware Problems
Should you indeed will have spy ware problems, you cannot depend on disinfection. You will need something similar to 'Ghost' and clean image to revive Windows to feel safe (Linux based analogs of Norton Ghost have the freedom). Browsing of gray sites should simply be completed in virtual machine atmosphere, as VM image may be easily disposable. Microsoft virtual machine is free of charge. And when you need to use Linux images, VMware player can also be free.
Bloat is the second major reason for the slowness of startup alongside spy ware. To be able to access the amount of bloat on the PC, you will need to produce the listing of services going after startup (before you decide to open every other programs) in addition to a listing of startup programs. You need to print this log and save it as being personal files too and thoroughly evaluate it.
Generally, Windows XP slow startup is triggered by numerous issues with registries. Without having done anything wrong and taking advantage of your pc inside a regular way, every move is tracked on registry: creating documents/folders/any file, browsing the web, playing game, setting up a credit card applicatoin... everything! Over time your registry is really filled with undesirable and corrupted records, that the scan of the registry would really cause you to look amazed: hundreds and maybe thousands of errors in your registry. You would not have enough time to get it done by hand, so make use of a software to wash your registry as well as your computer will breath again and improve your speed.
Now you have already know what are registry errors and how to fix them. Please use the best tool for repairing any errors in PC!