If the computer also starts getting slower at the same time as well, then it's time for a spring cleaning.
'When any computer is used under normal circumstances, a certain volume of garbage data is automatically produced,' says Harald Goerl, a professor for operating systems and computer architecture at the Bundeswehr University in Munich, Germany. Goerl nevertheless sees no need for routine clean-ups. 'You only need to do this if you can really feel that the speed has been impaired,' he says.
The primary culprit for PC slowdowns is software that is installed and then removed again. That's because many programs actually leave behind digital traces after uninstallation. The most common collection spot where junk data collects is the Windows Registry file. It's a database of information about all installed applications.
