I had came across this page some time ago, but no i'll just put the link for everyone to view and decide for yourself. These are some of the reasons why your computer runs slower and slower and then even slower.
Here it is: What slows your computer down.
For years now, i had been advocating people to remove Norton Antivirus from their systems, as is's a massive hog on system performance, and a eats your memory for breakfast. Removing it is a pretty hard affair as it leaves a whole trace of registry entries that requires manual editing. You guys might want to try this tool to see if it works, and then leave a comment.
Here are some other tips for you guys seeking to speed your computer up without burning another hole in your pocket.
1. Many programs install themselves in such a way so that it's components with start along when you turn your computer on. The most serious offenders are iTunes, Real Player, ICQ, Yahoo Messenger, Microsoft Active Sync.
I suggest you guys go and delete these start up entries so that you can use your computer's processing power to do something more beneficial.
2. Some services that aren't essential to the operations of the computer are running. ipodservice .exe and themes are 2 of those. Note that most of the services are critical to the daily operation of Windows OS, it's better not to touch it if you don't know what you are doing. I am running with minimal services on myself, and had seen a large performance improvement as a result.
3. System errors. It's recommended that you scan your drive once in a while to make sure that the data on it are not corrupted. Corrupted files can cause massive slowdowns that will end with error messages. To scan your drive for errors, right click on the drive from 'my Computer' select properties, and select the tools tab. Click on the Scan drive button and select both options. Let it run and it will ask you to reboot. Reboot and let it finish the process.
4. Fragmented files scattered along your partition cause long delay when you are reading something from the hard drive. Defragment your drive regularly to ensure that the files are staying at one place instead of in thousands of pieces here and there on the drive.
Now, back to the startup issue. I had been using a very nice program recently that managed to clean up a lot of the junk in my laptop. It's called CCleaner (Crap Cleaner). It's simple enough for everyone to use, so I won't be talking about using it. Just note that there is a startup option within the program for you to control which programs starts up with your computer and what should not.
That's all for this post, hope you enjoyed reading it. Till next time, c'ya
*Let's create a world full of LOVE~