It’s not unusual for computers to slow down in time. Clogging up the drive with large files, tracking objects left by websites or simply the age of the computer can all affect its processing speed. By regularly deleting unwanted files and running system checks it is possible to maintain an optimum performance speed.
Delete Unwanted Files
Go to "My Documents" and send any unwanted files to the recycle bin, including pictures and music.
Right-click on the bin icon and then click "Empty Recycle Bin".
Delete icons on the desk top that you don’t use.
Delete Unwanted Programmes
Go to the Start menu and left-click "Control Panel".
Left-click "Add or Remove Programmes".
Left-click the "Remove" button on any programmes you no longer want. Next to each programme you will see how often you use it and when it was used last.
Defragment Your Hard Drive
Go to the Start menu and hover over "All Programmes" with the mouse.
Go to "Accessories" and then go to "System Tools".
Left-click "Disk Defragmenter".
Select which drive you want to defragment.
Left-click "Analyse" to find out whether you need to defragment the drive. If you do, left-click "Defragment" and leave it to complete the process, which could take several hours.
Buy an external hard drive and back up files onto it, particularly larger ones or if you use a laptop which has less space than a desktop. Pictures and music files can take up a lot of space.
Run frequent checks for spyware and other malicious content from websites. Keep your anti-virus software up to date and run weekly checks, more often if you visit lots of websites or download a lot of content.
Make sure you don't have any programmes running in the background that start up automatically when you turn your computer on; these can be responsible for slowing down the start-up process.
If after all this your computer still isn't performing as it should, get the original operating system disks and reload them. Ensure you've backed everything up on to an external hard drive or similar beforehand, as you will lose any documents or programmes you've saved.