Alot can be said by AC's post. I will post this additional information to help those who are having problems. This information is fact.This will help resolve problems not only here but elsewhere you browse on the net.
First off there are so many settings on a computer I can't post it all in a single thread. What I will post is the important facts you need to understand and do if you want to have a trouble free system.
What you should understand is computers have a memory and if bad things are loaded or are in a prefetch file when the computer starts they must be destroyed to make way for new data. Simply put deleating the correct (bad)files and folders will reset the memory to factory specs.
The first step is to set your folder view options. You must see these files (that are hidden) to destroy them. If you do not set this option to view them you can't deleate them. Here's how.
Click on (start) locate (control panel) locate (folder options) and open it. Click on the (view tab).
Click on the button that says(show hidden files and folders). This will allow you to view files and folders that you never seen before. Also check off the box that says (hide extensions for known file types).Click on apply then OK. Done so far.
Next click on start and locate (Explorer)..This is not internet explorer. If you can't find explorer do this: Click on start then click on the run icon and type into the run box explorer .
This will start explorer and now you will have access to all those files you should remove. Next click on (local disk C). This is your hard drive with all your data that windows remembers when it starts.
Next find and locate (documents and settings). Open it up and look for YOUR (user name ) your logged on. Example..John Mary Mike Sue Bill ect.
Open up your (user name) and locate ( local settings).
Deleate your (history)..(temp)..(temporary internet files)..(recient).
Some of these in your (temp) may not be deleatable yet until you restart your computer. If you encounter some un-deleatable files restrart and remove. ALSO in the windows folder locate a folder called (prefetch) and deleate all of those.
Empty your recycle bin and restart your computer. Also make sure you clean the internet explorer cookies like AC said and deleate the history and the files.
Your in business for awhile. Practice this and maybe I will show you msconfig and regedit.
Merry Christmas to all.