Do exaclty what Minister of Doom said.
If difficultgo download spybot (google: spybot)then once loaded, go up to the top left Under MODE, click advanced, then more options will show up on the bottom left, go to TOOLSthen look for System Startup. You can choose from there.
A third option:From:
http://www.Intelliadmin.comThe prefetch cache
The first tip I want to talk about is the windows prefetch. Windows XP has this feature that loads commonly used programs - at boot time.
Here is how it works: Yesterday you used MS Word, and Duke Nukem 3D. Today you boot your system to check e-mail. It sees parts of these two programs in the prefetch folder and loads them into memory before windows completes the boot process. The benefit is faster application launch times. If you really wanted to use MS Word, it would pop up really quick when you double clicked on it.
The problem is most people have been running windows for years, and the prefetch gets clogged with stuff that you almost never use. Windows takes forever to boot because it is prefetching a 1.0 copy of Napster, and you just want to check your email before you have to go to work.
What can be done about it? Well there are a few things we can do to tweak the prefetch cache. One method is to disable it partially, and this can be done quite easily.
Simply browse to the windows folder (Ex: C:\Windows) and under there you should see the prefetch folder. Go into the prefetch folder and delete all the files