Using control panel, you can work your way through the installed programs and delete the ones you no lopnger require.
2. Clean Registry startup items.
Using regedit, you can work your way through startup items and remove the ones that arent needed immediately. This saves memory and makes your PC boot faster. If you've got skype for example, chances are that it starts when you start your PC, but you don't really need to start it until you want to use it. This applies to lots of different programs.
3. Remove Temporary files.
Deleting files from Temp and Tmp directories is perfectly safe. This gives you more space for things you really need to keep like family photos. Temp files take up lots of space and can slow down the rate at which data is read from your hard disk. Cleaning up these files is easy when you know how.
4. Scan for Viruses.
Use a decent antivirus program. The free ones are free for a reason.
5. Scan for Spyware and Adware.
Not many virus programs have spyware protection built in. Follow the PC Health Check Unleashed guide for a clear explanation.
6. Scan for Registry Errors.
7. Compress the Registry.
You need special software for this, but PC HealthCheck Unleashed can show you exactly what to do.
8. Tweak system services
Use system services to remove or diaable the ones thta arent needed. Many are for corporate environments.
9. Install more RAM
Adding more RAM can speed up a PC if your computer has space to add more.
10. Optimise Swap File
Move your swap file to a second hard disk to increase disk speeds. This is an easy change to make and requires only a little training to obtain the optimal settings. This small propcedure can have dramatic results.
These are just some of the tasks that can be performed on a slow PC computer. Many people are either afraid of breaking their PC or simply don't feel confident to make such drastic changes to their computers.
There are many tools available to fix "help" speed up your computer but why not learn how to speed up your computer yourself.