23/08/2013
If your computer has been running slower lately, no doubt you've sought help from friends, family and the IT people at work. Suggestions may range from the merely outdated "have you defragged it?" to the misinformed "there's too many icons on your desktop . . . they're clogging it up" or the fatalistic "mate, nothing will fix it except blowing it away and starting again".
We've all heard the lines and none of them are particularly helpful. In fact, the computer industry thrives on people who've been given bad advice, throw up their hands in despair and end up buying a new PC.
Here are some ways to clear out your computer and get it back to optimal performance.
Find stuck programs and kill them
This is a technique you need to keep in mind at all times, because you'll need it frequently. Since modern PCs can run many programs at once, sometimes you won't notice when one is stuck. Worse, these programs will often consume more and more processing power, slowing down the rest of your computer. Fortunately, they are easy to find.
On Windows XP or Vista, press Ctrl+Shift+Esc, which will bring up the Windows Task Manager. Click on the "processes" tab to see all the software running on your system. Click the "CPU" column heading to sort the column in descending order. This will show apps using the most CPU at the top. Look at the list for 30 seconds or so and if one is consistently using a very high percentage of CPU time, it might be a hung program. You can click on the process name and then the "end process" button to kill the troublesome app (note, this will instantly shut down the app and you won't have an opportunity to save any files).
On a Mac, you can use the Activity Viewer to see hung apps. This is found in the Applications/Utilities folder. Open it up and click the "CPU" column heading until the applications are listed by their CPU usage, from highest to smallest. If one is consistently using a very high percentage of CPU time, it may be stuck and you can click on the program name then click the "Quit Process" button on the toolbar. Programs listed in red are ones that OS X has detected are hung (though this is not always accurate - sometimes a big app like iPhoto is just taking a long time to save its database and close down).