This tip is especially for those who keep their computers on a carpet, have pets, and don't clean the house as often as they should (you know who you are). And actually, everyone should be checking out the interior of their computer every few months, even if you think you are Mr. Clean himself. Some people have wiped their computer clean of spyware and yet still have a slow running computer. Well, today we are going to take a look at the other way to clean your PC.
The floor of a carpeted room is the worst place to keep your tower.
Cookie crumbs, ashes (from those who smoke), pet hair and dander, and
dust all wind up on your carpet - and then inside your computer. You ask
"How can all that get inside?" It's the laws of physics. You have at
least one fan in the back of the tower pulling warm air out of the
computer - which creates a suction effect and pulls cooler room air into
the front, displacing the warm air. With this suction effect, anything
light enough to be drawn in likely will find its way into the innards of
the computer. Once the fans are blocked with debris and the temperature
rises enough inside, the tower will slow the processor down to protect
itself. Continued overheating of the system will cause component
failure. The older the computer, the worse it seems to be.
"So what can I do to prevent this?"
There are a few things you can do: READ MORE

So your Windows PC is running slow, crashing, or acting funny. You're sure there's no hardware issues. This leaves one big suspect: malware. When XP was ruling the roost, reinstalling operating systems once or twice a year was the norm for a lot of users. However, installing a fresh version of Windows is not always practical or possible. So what do you do? Put on your geek cap, be ready to bring a bevy of anti-virus hammers on the malware infecting your system, and read on!