If you are using windows for a long time then its tend to be slow quit regularly specailly windows startup. When you install a program it updates registry and add a link to startup directory to load it when windows start. It is quit useful but it also slows windows startup. To remove the programs from startup menu Click Start then click Run. Run Dialog appears write msconfig in the dialog box and hit enter. System Configuration Utility appears with diffrent tabs on it.

Click on startup tab to view its settings. For faster startup click on Disable All Button to disable all the startup programs. It will not effect windows at all but speeds up windows startup as there is no program in the startup. Then Click Apply and Restart your Computer.

2. Disable windows visual Effects.

Another ways to make windows faster is to disable windows visual effects. For this right click on My Computer icon on your Desktop and click properties. This will open System properties Dialogbox like one below.

Then click on Advanced Tab to view its properties. Click on Settings button to view Windows Visual Effects dialog as shown below.

Now for best performance click on Adjust for best performance as shown in picture. This will disable all the visual effects in windows Xp. Click apply and you are done.