1 Scan your system for spywares and viruses:
The system should be scanned regularly. Antispyware software can help protect your computer from spywares, viruses and other potentially unwanted software, and speed up your PC’s performance.
2 Do not install unwanted tool bars & applications:
Be careful when installing or updating applications that may install a toolbar by default unless you deselect the toolbar option. This may slow down the system.
3 Check what programs are running in the background:
Some programs start automatically after the computer boots. These programs keep on interrupting the system’s functions. Uninstall or deselect the applications you don’t need at the time of working.
4 Delete browsing history and temporary files at regular intervals:
The temporary files and history should be deleted to allow your browser to function faster. Also, check how much RAM your system allows you, and upgrade it as most laptops run on not more than a 1 GB RAM.