Is the Notification area, on the left-hand side of your task bar cluttered with icons? Does it take ages to start up your PC? It might be caused by software programs you installed on your system. After the software is installed, a small icon is placed in the Notification area. The icon facilitates quick access to the software. If you do not use some of these icons, disable them and save precious physical memory. Decide which program icons you use regularly and whether you want to keep these in the Notification area. I recommend keeping virus scanners and printer/scanner icons.
Click on 'Start', 'Run', type 'msconfig' in the 'Open' field and click OK to open the System Configuration Utility window below. Click on the 'Startup' tab to get a list of all your system's startup programs. Tick the boxes of the programs you want to disable and click OK to continue. Reboot your system and check if everything is working fine. You can always re-enable the disabled startup programs by re-opening the System Configuration Utility and ticking the boxes of the disabled items. Reboot your system for the changes to take effect.