Computers can appear to slow down with use. Although degrading hardware (such as hard disks) can contribute, the main cause is usually incorrect, temporary and historic files or settings affecting the software.
You can prevent and reduce the effect of slowdown on your computer by performing simple maintenance.
Reboot your computer
Clear your temporary internet files
Remove any unwanted files from your desktop, M: drive and departmental/section drives
Disk maintenance is automatically performed on any computer left switched on overnight (this only needs to be performed occasionally).