Gnomie Hai-Shuo Shun writes:

Slow computer getting you down? Wish you could speed up your system so that games won’t crawl by like a slide show permanently set to slow? Well look no further! I shall share five easy steps that you can take to improve your system’s speed! Most of them are free of charge, and all of them should have some effect on your system. So without further ado, we begin with:

1. Remove spyware and adware from your system. Have you noticed recently that ads seem to pop up whenever you go to a Web page? Or that Internet speeds are about that of diseased livestock? Your system’s probably chock full of spyware. What to do? Well, thankfully there are several things you can do. First, download either Spybot-S&D or Lavasoft’s Ad-Aware, and run it. This should remove most if not all of the spyware and adware on your system. Neither of these are particularly robust, however, so we move on to:

2. Remove viruses from your system. Get yourself a decent virus scanner program. Big names include MacAfee, Symantec, or Norton. By the way it should be mentioned that virus scanners like the Big Three tend to be huge. Big, beefy programs that can chew up RAM faster than Dudley Dursley chewed up Harry’s birthday cake. If this is a problem for you, take a look at avast! avast! is a free virus scanner that can be downloaded, but be careful. Phishing sites love to pretend to be “free virus scanner software” and so you have to be careful. Yes, avast! is a respected name and is not a virus, but only if you actually download it and not some trojan.
3. Defragment your hard drive with the disk defragmentation tool, usually located in Start / Programs / Accessories / System Tools. This useful little program will improve performance by compacting your data so that your programs aren’t all located in tiny little bits. Some people might argue this point, saying that defragmentation doesn’t actually improve anything, but look at it this way: it never hurts at worst, and at best has a chance of improving your runtime! So where’s the loss?
4. Remove dust. Buy some cans of compressed air (yes I’m aware of the irony of purchasing a can of air. No, I do not wish to purchase any bridges today). Using this compressed air, blow the dust out of your system. That dust does your CPU no favors and a thick, liberal coating of dust tends to collect when you leave your computer running in a dirty room. Oh and by the way, after you’ve blown all that dust into the air, it’ll settle. All over your carpet. So you might wanna vacuum later. Just an idea.
5. Clean your registry. CCleaner is a good registry fixer that’ll fix all those broken things in your registry. By the way, don’t go mucking about in the registry without backing it up first. If you do not do this, then I cannot be legally responsible for any time rifts, space distortions, or world wars caused by unexpected changes made by CCleaner. That said, properly done, a registry change often helps in improving performance. Also check your startup programs: there are programs that are set to start as soon as Windoze boots, and this can cause Windoze to start up slower. Removing a few (AIM is a good one) might improve your startup process. You might keep your hair a bit longer, too.

One final bit of advice. Oftentimes I’ll see on PC-building Web sites people wondering why their computer is “running so slowly even though they have the best gear.” The word of advice? Check your PSU (Power Supply Unit). How far do you suppose you’d get if your car’s gas tank had a maximum capacity of 2 gallons of gas? Would you want such a car? Well, your “awesome gear” won’t get too far on a puny PSU either. If your computer’s operating much slower than you’d expect from your hardware, consider replacing your PSU with one that can actually handle your power-hungriest parts (usually your CPU and GPU). Calculators for what wattage of PSU you might need are all over the Web. Just to be safe it might be better to go 50 watts or so above the recommended, just in case you decide to add something else later.