Ce site:
http://www.techbuilder.org/article.htm?ArticleID=47626
a ete sité sur plusieurs sites il y a de sa meme pas 1 semaine 
Je cite:
4.) Disable file indexing. The indexing service extracts information from documents and other files on the hard drive and creates a "searchable keyword index." As you can imagine, this process can be quite taxing on any system.
The idea is that the user can search for a word, phrase, or property inside a document, should they have hundreds or thousands of documents and not know the file name of the document they want. Windows XP's built-in search functionality can still perform these kinds of searches without the Indexing service. It just takes longer. The OS has to open each file at the time of the request to help find what the user is looking for.
Most people never need this feature of search. Those who do are typically in a large corporate environment where thousands of documents are located on at least one server. But if you're a typical system builder, most of your clients are small and medium businesses. And if your clients have no need for this search feature, I recommend disabling it.
Here's how: First, double-click the My Computer icon. Next, right-click on the C: Drive, then select Properties. Uncheck "Allow Indexing Service to index this disk for fast file searching." Next, apply changes to "C: subfolders and files," and click OK. If a warning or error message appears (such as "Access is denied" ), click the Ignore All button.
Donc pour repondre a ta question, oui sa accelere windows xp 
Personnellement, je l'ai fais mais j'ai pas encore assez utilisé ma becane pour en conclure quelque chose
---------------
PSN/XBL: KikitheKing
