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The Greatest PC Mysteries--Solved!

30.04.2012
PC owners know that every computer has a unique assortment of components, applications and peripherals. Nevertheless, certain things--including a host of common PC problems and mysteries--are part of the shared experience of computer ownership. The editors at PCWorld have seen and solved hundreds of PC mysteries, ranging from balky printers to diffident video players to persnickety file attachments. Most of the answers to these tech questions are simple and straightforward, so we've taken the liberty of compiling some of the most frequently encountered PC mysteries into a single list that we'll update regularly. Following each question we provide a short response that summarizes what we know. For a more detailed explanation and some helpful tips, click the links in each answer.

Windows maintains a list of programs that automatically run every time you boot up your computer. Some of these startup programs (such as antivirus utilities) are beneficial, but many of them are not necessary and can slow your PC as they run automatically in the background. Speed up your boot time by .

This can happen for a lot of reasons--and unfortunately almost all of them are bad news. The most likely answer is that a fan or hard drive in your PC is starting to die, causing it to spin off-kilter. PCWorld contributing editor Lincoln Spector wrote a smart guide to pinpointing the source of a grinding-sound problem in this . No matter what the cause turns out to be, you should immediately , just in case.