It could be indicative of other problems though - Try Topguns solution, but are there other things that seem to slow you down? Do you have long Aperture Circle (Ie, "Busy") wait times, when clicking on shortcut on your desktop or opening a program? Or is it only when you Right Click? You should get an Immediate Popup Window.
Try his solution, but you may want to check your if Disk needs to be optimised, or run a CHKDSK. I run Disk Optimization every night at midnight on all of my disks.