➟ 105 Chapter 6: Keeping Intruders out of Your Computer Security services Figure 6-1 Configure Windows Security Center 1. Choose Start➪Control Panel to open the Control Panel window. 2. Follow the appropriate step for your version of Windows: • Windows XP and Vista: In Classic View, double- click the Security Center icon. • Windows 7: In Classic (icon) View, click Action Center and then choose Security. In Category View, click System and Security; then click Action Center and choose Security. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 106 Part II: Keeping Your PC Healthy with Preventive Maintenance Whichever method you use, Windows Security Center opens, displaying an opening screen similar to the one shown in Figure 6-2. Click to get more information online. Note the settings for Security Center’s monitored areas. Figure 6-2 3. Study this screen to understand what Windows Security Center is monitoring and make sure that your computer is protected. If all sections are marked On or green, Security Center is configured properly, and crucial secu- rity software is running. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 107 Chapter 6: Keeping Intruders out of Your Computer Vista and Windows 7 also include an Other Security Settings section, where you can check the status of User Account Control (UAC) and Network Access Protection (NAP). UAC lets you know when pro- grams try to make changes in your computer. NAP, which is for corporate networks, verifies individual computer configurations and manages automatic updates. Build a Firewall in Windows 1. Choose Start➪Control Panel to open the Control Panel window. 2. Follow the appropriate step for your version of Windows: • Windows XP: In Classic View, double-click the Windows Firewall icon. • Vista and Windows 7: In Classic View, click Windows Firewall. In Category View, click System and Security and then select Windows Firewall. Whichever method you use, Windows Firewall opens, displaying a screen like the one shown in Figure 6-3. A public network is simply one that anyone can access without entering a passcode. This type of network may be in your home or at a business. Unless you live in a remote area, your home network should be passcode-protected. This topic is beyond the scope of this book; for full details, see Home Networking For Dummies, 4th Edition, by Kathy Ivens (Wiley Publishing). Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 108 Part II: Keeping Your PC Healthy with Preventive Maintenance Click these links to configure your firewall. Figure 6-3 3. If you need to expand access through the firewall, click the Allow a Program or Feature through Windows Firewall link. Certain applications, such as Windows Live Sync, are given expanded access automatically, but you may also want to give access to devices such as cell- phones or media players, or to a custom business or per- sonal application. 4. Click Turn Windows Firewall On or Off if you want to disable the firewall completely for testing or to allow spe- cific one-time access. (Just remember to turn the firewall back on when you finish.) Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 109 Chapter 6: Keeping Intruders out of Your Computer If you prefer, you can use a separate firewall product or one that’s built into a third-party security program. Follow the manufacturer’s instructions about using the firewall product on a PC that also has Windows Firewall installed. Check for Viruses If your computer doesn’t have a capable, up-to-date antivirus or broader Internet security program, stop reading right now. Go get one of these programs, install it, and give your computer a full scan. Be sure to follow the instructions carefully. Some manufac- turers set up their antivirus products so that they scan your system before they’re installed; others take over after they’re in place. 1. Make sure that you always have the latest updates for your antivirus or security program. Some programs check for and download updates automatically based on a schedule that you set. You can always check for updates manually as long as you do so regularly (see Figure 6-4). 2. Every week or so, use the program to scan your computer for viruses. Run the program any time things suddenly go strange on your computer — if files are missing or renamed, for example, or if your Internet home page has changed without your knowledge. Do this even if you scanned your PC recently, because viruses can attack at any time. 3. If your computer’s antivirus or Internet security program displays an ominous warning, follow the onscreen instructions carefully to remove or quarantine the threat. Many security-software makers offer specific tools for removing particular virus strains that broke out into the wild despite precautions by computer users. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 110 Part II: Keeping Your PC Healthy with Preventive Maintenance Click to check for security and antivirus updates. Figure 6-4 Fight Malware ➟ Inspect e-mail before opening it. Pay attention to the details of an e-mail before you open it. Be espe- cially cautious about e-mails that are addressed to undisclosed-recipients or to a name you don’t recognize, and about e-mails that have a blank or odd Subject line. Anything you receive by e-mail that seems too good to be true probably is (see Figure 6-5). Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 111 Chapter 6: Keeping Intruders out of Your Computer E-mail that’s not addressed to you personally means spam at least and possibly something more nefarious Figure 6-5 If you receive an e-mail from someone you don’t know, the best thing to do is delete it without open- ing it. Also, never follow a link in an e-mail unless you’re sure where it goes. ➟ Be wary of attachments. Never open an attachment to an e-mail or to an instant message (IM) unless you know and trust the source — and even then, ask yourself whether the risk is worth the reward. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 112 Part II: Keeping Your PC Healthy with Preventive Maintenance If you do decide to accept an attachment of any kind — music, video, a picture, or any other type of file — use an antivirus or security program to scan it before opening it (see “Check for Viruses,” earlier in this chapter). ➟ Be leery of links. If you receive an e-mail or IM with an embedded Web link, don’t click that link within the message. If you decide that visiting the Web site in question is worth your time (and the risk), copy the link to your computer’s clipboard and then paste it into your Web browser’s address bar. This method gives your Internet security program a better chance to block a malicious Web site or identify other prob- lems with the link. ➟ Message with care. When you’re connected to an IM session, be on the lookout for strange or inappropri- ate messages, links, or offers of downloads. A person with bad intentions may have managed to obtain the password and login information of someone you know or otherwise found a way to pose as someone else. End the IM session immediately if something strange happens, and consider notifying the provider of the IM service. ➟ Avoid autorun. Turn off the autorun feature that automatically starts the execution of programs on memory sticks and other USB devices (see Chapter 2). In Vista and Windows 7, you have a lot of control in this area. Just follow these steps: 1. Choose Start➪Control Panel to open the Control Panel window. 2. Click Hardware and Sound and then click AutoPlay to display a screen like the one shown in Figure 6-6. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 113 Chapter 6: Keeping Intruders out of Your Computer For maximum security, choose Ask Me Every Time for all media. Click Save after making changes. Figure 6-6 3. Make a new choice from the drop-down menu for any medium you want to change. (Notice that by default, Software and Games is set to Ask Me Every Time. It’s probably safe to autoplay DVDs and audio CDs, but if you have any doubts, leave this menu set to the default.) 4. Click the Save button to save your changes. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. ➟ 114 Part II: Keeping Your PC Healthy with Preventive Maintenance In Windows XP, you don’t have this level of control, but you can make some changes in the Internet Options dialog box, which you access by choosing Start➪Control Panel➪Internet Options. Click the Security tab, scroll down to select Prompt under Launching Applications and Unsafe Files, and then click OK. Stop Spyware ➟ Block secret transmissions. Set your firewall (see “Build a Firewall in Windows,” earlier in this chap- ter) to block any requests by a program to send out- going messages without your permission. ➟ Click Internet ads rarely and carefully. Be very selective about clicking online advertisements. When you open an ad, you’re communicating with a Web site, and that communication may trigger the down- load of malware. ➟ Turn off e-mail previews and automatic down- loads. Most capable e-mail programs allow you to turn off automatic previews and downloads of e-mail contents. Figure 6-7 shows the option that you’d dis- able in Microsoft Outlook Express. ➟ Beware of unusual error messages on the Internet. A Web site may warn you that your computer is at risk or request your permission to download a free utility. Unless you asked for this sort of assistance — and also know and trust the source — close both the Web page and your Web browser without accepting the offer. ➟ Don’t take software from strangers. Be very careful about accepting any offer of free software. The program you receive may not be what you want, or it may deliver hidden malware along with a useful function. Please purchase PDF Split-Merge on www.verypdf.com to remove this watermark. [...]... open until the helper logs on to your computer Figure 7-4 7 When your helper accepts the invitation, a dialog box pops up on your screen, asking for permission to give this person access to your computer Click Yes to start the Remote Assistance session 8 The expert will ask to take control of your computer by clicking a button in his console, and a message appears on your screen to tell you about the... utilities for e-mail, and keep it current (see “Check for Viruses,” earlier in this chapter) Know who your online friends are If you use an IM service, reject any messages from people you don’t know Most services allow you to create buddy lists for that purpose (see Figure 6-9) Unfortunately, marketers, promoters, salespeople, and crooks can find your ID and make themselves your buddy in an effort to... up on your screen, asking for permission to give this person access to your computer Click Yes to start the Remote Assistance session 7 The expert will ask to take control of your computer by clicking a button in her console, and a message appears on your screen to tell you about the request Click Yes (or, if you change your mind, No) When an expert has taken control of the computer, both ends of the... some general tips in Chapter 4 Also see Part IV for fixes for your PC’s operating system (Windows) ➟ Hardware failure: When hardware fails, it usually can be replaced Notice that I don’t say repaired Modern computers have very little hardware that an amateur technician can fix, and the few parts that an expert might be able to repair (such as the motor for a hard disk drive) don’t make economic sense... is when you’re shopping for a new computer You can start with a support Web page To get a feel for the type and quality of customer care you’ll receive, contact the ➟ 123 Part II: Keeping Your PC Healthy with Preventive Maintenance manufacturer before you buy the PC, and ask a question about something you don’t understand If the company doesn’t treat you well before it has your money, what makes you... search for Windows Remote Assistance, and click the link for your version 1 Choose Start➪Help and Support to open the Windows Help and Support window 2 In the Ask for Assistance section, click Invite a Friend to Connect to Your Computer with Remote Assistance Windows Remote Assistance opens 3 Click Invite Someone to Help You 4 In the next screen, choose the option you want to use to contact your helper:... for permission to give this person access to your computer Click Yes to start the Remote Assistance session 7 The expert will ask to take control of your computer by clicking a button in her console, and a message will appear on your screen to tell you about the request Click Yes (or, if you change your mind, No) When an expert has taken control of the computer, both ends of the communication share... section of the resulting dialog box, enter your helper’s e-mail address; then click Invite This Person and follow the onscreen instructions Your helper gets an automatic e-mail invitation that’s really a file containing all the information (except the password) that your helper needs to find your computer and log in 6 After you send the invitation, you see the Waiting for Incoming Connection window (see Figure... security software Those statements can be faked too ➟ Beware of any unsolicited request for your login info A common phishing tactic is an e-mail that tells you to click a link to update your financial information; otherwise, your accounts will be canceled A legitimate Web site may require you to change your information from time to time — but always on the Web site itself and only after you’ve already... to reach you Delete any name in your buddy list that you don’t recognize Chapter 6: Keeping Intruders out of Your Computer Check your buddy list whenever you open your IM program Figure 6-9 ➟ 119 Part II: Keeping Your PC Healthy with Preventive Maintenance ➟ 120 Getting Help When Prevention Fails W hat a terrible question to have to answer: Should a valued, trusted computer live or die? The economics . your computer for viruses. Run the program any time things suddenly go strange on your computer — if files are missing or renamed, for example, or if your. worth your time (and the risk), copy the link to your computer s clipboard and then paste it into your Web browser’s address bar. This method gives your