The 21 greatest PC mysteries–solved!

Find out why your documents won’t print, where your downloads disappear to, what a .dat file is and much more

Free Google service offers useful enhancements beyond pulling together different phone numbers

Standby vs. hibernate mode, the wonders of uninterruptible power supplies and the oft-ignored (and useful) Windows key

From new uses for the mouse wheel to eliminating the double click

Coral your music, video and photos and transform your PC into a self-contained media centre