The Best Computer Tips and Tricks: Wireless Home Networking

Fix Connectivity Issues

It sounds crazy, but 95 percent of all Internet connectivity problems can be solved by power-cycling both the router and the modem. Turn them both off, and then turn the modem back on first. Once its "sync" or signal light comes on, turn on your router.

Use Encryption

You've probably heard this before, but it bears repeating: Always enable your router's wireless security! Wired Equivalent Privacy (WEP) encryption is the oldest (and weakest) form of security; the newer (and stronger) Wi-Fi Protected Access (WPA) and WPA-2 are the best protection available today for home users.

Update Your Router's Firmware

All routers include internal read-only chips with embedded instructions that can be updated by the manufacturer. Router manufacturers generally update a product's firmware to increase performance as well as to resolve bugs and security issues, so it's wise to keep your router's firmware up-to-date. Check the manufacturer's Web site for the latest updates.

Boost Your Wireless Signal

If walls and distance are causing wireless signal degradation, you can do a few things to boost it. Move your router to higher ground—the signal radiates downward. You can also try a signal extender (or repeater), which boosts the signal. Finally, high-gain antennas will work, but they only focus the signal in one direction.

Change Admin Password

Every router has a well-known default password that's used to access the router's browser-based configuration page. Most setup wizards will make you change this password, but not all do. If not, be sure to change it yourself to prevent unwanted hangers-on from changing your network's settings.

Go Back to Factory Settings

If you've lost or forgotten your router's login credentials, you can get around this predicament by resetting the router to its factory settings. Do this by holding down the button on the back of it for 30 seconds. Next, look in the manual for the default user name and password, and then change them on your router's browser-based configuration page.

Disable SSID Broadcast

Unless you disable it, your router broadcasts its service set identifier (SSID)—the name of your network—which allows your neighbors to see (and attempt to gain access to) your network. Instead, disable broadcasting, making the network appear as "SSID not broadcast." Access the unnamed network by typing in the SSID name when prompted.

Change the Default SSID

Change your pre-defined, default SSID—leaving it as "Linksys," for example, tells the world that you haven't configured your router, which invites attackers.

Filter by MAC Address

Every piece of networking gear includes a unique "fingerprint" called a media access control, or MAC, address. You can configure your router to filter connections using these addresses so that only your computers can connect to your network. Most routers will show you connected devices, so adding an adapter's MAC address is a one-click process.

Step Up to 5GHz

The majority of today's networks operate in the crowded 2.4GHz frequency range, which is shared by microwaves, cordless phones, and other home networks. To avoid possible interference, many new routers are capable of broadcasting at 5GHz, which has 23 wide-open channels as opposed to 2.4GHz's three non-overlapping channels.

Limit Your Number of DHCP Clients

Most people use their router as a DHCP server; when clients connect, the router dynamically assigns IP addresses from a large pool of addresses. Limiting that list to the number of clients in your home, however, will help prevent interlopers from hopping onto your network.

Use Your Router's Firewall

Two features make most hardware firewalls more powerful than software firewalls: stateful packet inspection (SPI) and network address translation (NAT). SPI examines packets' content and behavior before granting access, and NAT hides all PCs connected to the router from the Internet, "translating" their IP addresses into private ones that are unreachable from outside the firewall.

Change Your Channel

Wireless B and G (and some N) routers operate at the 2.4GHz frequency, which only has three non-overlapping channels: 1, 6 and 11. By default, your router will most likely be using one of these channels, and the bad news is so your neighbors' routers as well. If you experience dropped connections, sluggish performance or both, a good first step is to switch the channel. If it's set to channel 1, go to 11. If it's set to 6, try either 1 or 11 for best results.

Let Windows Control Your Wireless Networks

If a network adapter's software takes control of your wireless network, it can be difficult to put Windows back in charge. First, click Start, then Run, then type services.msc. Scroll down to Wireless Zero Configuration and start the service. Right-click your wireless connection, select view available networks, and then click advanced settings on the left. Click the wireless networks tab, and check "Use Windows to Configure my wireless network settings."

Disable File Sharing in Public

If you're in a public place with a Net connection, it's a good idea to disable File and Printer Sharing for Microsoft Networks. In the properties of your network adapter, uncheck the appropriate box. It's also a good idea to switch your notebook's wireless radio off if you aren't using it.

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The Best Computer Tips and Tricks: Laptops

Make Your Own Power Plan

Windows laptops include a few preset power plans for maximizing battery life, but you can also customize your operating system's power-management features (in Windows XP, under Power Options in the Control Panel; in Vista, under Mobile PC in the Control Panel). Setting aggressive targets for when the display turns off and when the machine goes into sleep or hibernate mode will help your battery last longer.

Limit Your Connection

When you aren't actively using your notebook's Wi-Fi, Bluetooth, WWAN, or other wireless connections, turn the radios off (via the hard switch, if your PC has one, or using the appropriate utility), so they don't run down the battery while they keep searching for a signal. Also, use USB-attached devices sparingly while you're mobile.

Track it down

Thousands of laptops are reported stolen every year. Our advice? Prepare for the worst by investing in tracking software like Absolute Software's Lojack for Laptops, CyberAngel Security, or the free TheLaptopLock. These utilities can pinpoint a registered notebook's location once it connects to the Web, increasing your chances of recovering your system.

Dim the display

A laptop's biggest battery-life-sucking component is its LCD display. To eke out more juice when you're off the plug, turn down your panel's brightness to the lowest level your eyes can stand. Most notebooks have a Function key combo—or even a dedicated hot key—for a quick crank-down. (You can also adjust brightness in Display Settings under Control Panel.)

Keep It Cool

Thanks to their small, cramped cases and tiny vents, laptops are prone to overheating. Unfortunately, using your notebook on your lap—or on top of a blanket that protects your lap from your scalding-hot notebook—can seriously stifle ventilation and make matters worse. To help keep temperatures in check, opt for a lap desk or a laptop cooling pad that won't conduct heat or block your laptop's vents.

Back Up Everything

Constant movement puts computer components at risk, and because of their portability, laptops suffer a lot more wear and tear than desktops. All of that on-the-go use increases the risk of hard drive failure, so make sure you back up the data on your laptop to an external hard drive, thumb drive, or home server on a regular basis. Portable hard drives like the Western Digital Passport Elite make it easy to back up your data on the road.

Cover Your Keyboard

Keep liquids away from laptops at all times. That rule often gets broken, of course, and accidents happen. Should that accident end up on your laptop's keyboard, however, you could end up with more than just a mess: Liquids that seep through your notebook's keys can fry its components. Protect your notebook from spills with a custom-built, plastic keyboard cover from ProtecT Laptop Covers.

Buy a Bag

If you plan to carry your notebook with you, the most useful accessory you can buy is a laptop bag. They're available in a number of styles and prices; for maximum protection, we recommend investing in a model with a built-in padded sleeve. If you want something less conspicuous (thieves have been known to target obvious-looking laptop bags), cover your laptop in stand-alone sleeve and stow it in your backpack or briefcase.

Let It Accumulate

When you move your laptop from a cold to a warm environment, and vice versa, don't boot up until your system reaches room temperature. Sudden temperature changes can cause condensation to build up inside the notebook case; turn it on too quickly, and the moisture could damage your system's inner components.

The Best Computer Tips and Tricks: Data Security

Disable Remote Registry Editing

Only you should be editing your Windows registry, so make sure this service is disabled by clicking Start, Run, and then typing "services.msc." Scroll down to Remote Registry and make sure the service is stopped, and then set it to either manual or disable.

Lock It Down

It's always a good idea to lock your PC if strangers are nearby and you step away for a few minutes. Just press Windows key+L to lock your PC. Alternatively, you can set your screensaver (via the Screensaver tab in Display Settings under Control Panel) to require a password if it's deactivated by checking the box in "Settings" that says "On resume, password protect."

Prevent Phishing Attacks

Protect yourself from identity theft and phishing attacks by using the the latest versions of Firefox, Internet Explorer, and Opera. These browsers include protection that double-checks URLs against a blacklist, and will notify you if you're about to visit a known phishing site.

Keep Your Software Up to Date

Hackers and crackers love to take advantage of exploits found in software, which causes the developers to release a patch to plug up the holes. Therefore, it's imperative you not only enable Windows Update but also download the latest version of any software on your system, especially your Web browser and antivirus program.

Be Wary of P2P Files

Virus makers love peer-to-peer file-sharing services. They name their virus "Angelina Jolie Wallpapers" or something similar and upload it. Then millions of people download it, launch it, and wonder why their computers are infested with viruses. Download with caution, and always use antivirus software. If you need an effective, free antivirus solution, we recommend AVG Free.

Wipe the Drive Before Donating Your Old Computer

If you are getting rid of a hard drive and want to render all or some of its data unrecoverable, you have two options. You can download Eraser to securely wipe any file or folder, and you can use Darik's Boot and Nuke SE (DBAN) to write over the entire drive. To use DBAN, download it and burn it as an ISO disc, then boot from it. It will provide you with instructions on the welcome screen.

Encrypt Sensitive Files

If you want to encrypt sensitive data, you can buy a portable USB drive with built-in encryption like the CMS ABS-Secure Encrypted Backup System, but if you just want to protect a specific folder or group of files, we recommend Truecrypt, which is free. It encrypts a custom-sized volume with 256-bit AES encryption, so it's extremely secure.

Verify Your Backups

Many people have a "set it and forget it" mindset when it comes to backups. Even after you establish a regimen, however, it's critical that you check the target folders periodically to ensure the proper files are being backed up. If not, re-configure your backup routine to make sure it's working properly.

Back Up Your Data

You must back up your data, period. If you have the means, we highly recommend an external USB drive like the Maxtor OneTouch 4 Plus. If you already have an extra drive in your system—but just need some good backup software—try the free version of 2BrightSpark's Syncback, which is sublimely easy to configure.

Turn Off Your PC During Lightning Storms

Even surge protectors can be overwhelmed during electrical storms, and we've seen the results first-hand—fried motherboards, processors, hard drives and power supplies. If you're experiencing a heavy-duty electrical storm, take our advice and unplug your computer from the wall socket—just in case. And buy a laptop to use until the crisis passes.

Enable S.M.A.R.T for Your Hard Drives

S.M.A.R.T (self-monitoring analysis and reporting technology) allows your drive to report whether it's about to fail, which can give you a heads-up to replace it. All the modern hard drives have it—go into your PC's BIOS (press Del or F2/F10 during bootup) and enable it.

Enable Extension Viewing

By default, Windows hides file extensions, and virus-makers exploit this feature by giving their executable program names like Popularsong.exe, which appears as a harmless audio file if you have extensions hidden. To enable extension viewing, open any folder and click Tools, Folder Options, and uncheck "Hide extensions for known file types."