What You Need to Do to Recover from a Virus Attack

Category: Tutorials

What You Need to Do to Recover from a Virus Attack

 

Summary Viruses are costly and can try your patience and resources. If your system has been compromised, there are several key steps to get up and running again as soon as possible. Learn about how to remove a virus and restore your system. And remember, prevention is always the best security policy.

Introduction

Bad news—you've suffered a virus attack. Take a few seconds to get over the initial shock, but only a few seconds.

Once a virus sidesteps your security defenses, it can quickly rip through your system, destroying files, corrupting data, rendering applications useless, and in general causing an expensive lull in productivity. You need to act immediately. Follow the steps below to remove the virus and restore your system.

  1. Disconnect and isolate. Think of it as putting the infected computer into quarantine. If you suspect that a computer has been attacked by a virus, physically disconnect the machine. An infected machine can endanger other computers. 

  2. Clean up. Once the computer has been disconnected, you need to remove the malicious code. Use removal tools written for the specific virus. Your antivirus softwareshould have updates or patches available for the specific security threat. If this software hasn't been updated recently, be sure to do so. Symantec Security Response makes both removal tools and updated definitions available as soon as a threat is discovered. General information, new alerts, and step-by-step guides are available on the Symantec Security Response site.

  3. Restore. After a virus attack, damages may range from changed file names to obliterated files to permanently disabled software applications. Before resuming work, you need to restore your computer to its original condition.

  4. Reinstall. The extent of damage depends on the particular virus. If your operating system is completely destroyed, you'll need to reinstall. Use the 'quick restore' CD that came with your computer to restore your computer to its original configuration. This means that you will lose any applications you may have installed or data files you may have saved. Before you begin the reinstallation process, make sure you have all the necessary information handy - original software, licenses, registration, and serial numbers. 

  5. Scan for viruses. After restoring and reinstalling, scan your entire network, including all files and documents, for viruses. Use the most recent virus definitions available for your antivirus software. 

  6. Restore your data. This assumes that you have been diligent about backing up your files. If you don't follow a regular schedule of backups, your files will be permanently lost. If this is the case, learn from your mistake and make sure to back up regularly from now on. Keep in mind, not all viruses target data files – some attack only applications.

  7. Prevent future attacks. Run antivirus software and keep virus definitions current. Ensure security patches are up-to-date. If you haven't been running antivirus software, start now!If you lost data files in the recent attack, you will want to create and enforce a regular backup schedule. Next, you will want to change all passwords, including ISP access passwords, FTP, email, and Web site passwords. Some viruses can capture or crack passwords, leading to future vulnerabilities. Change passwords immediately.

Conclusion

Above all, learn from this experience. Prevention is always the best security policy. If a virus penetrated your defenses, consider changing or enhancing your current security practices. Ask yourself why your previous security measures weren't effective. Have you been diligent about updating virus definitions and security patches? Do you need a firewall? Are files being downloaded without being scanned first? Now is an ideal time to comb through, edit, and reinforce your security policy.

Related Links

Product: Norton AntiVirus: Antivirus Software - Spyware Remover 
Product: Norton Internet Security: Spyware Protection - Anti Virus Software 
Product: Norton Ghost 12.0: System Restore - PC Backup Software 
Product: Norton Save & Restore: Data Recovery - System Recovery - Computer Backup 
Product: Norton Internet Security for Macintosh: Mac Spyware Protection - Parental Control 
Product: Norton AntiVirus Dual Protection for Mac: Apple Virus Protection 
Product: Norton AntiVirus for Mac: Mac Antivirus Software - Mac Virus Scan 
Norton Downloads
Viruses & Threats: Conficker Worm (aka April Fools 2009, April 1st Virus)

 

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  • Date: 25-06-2011, 19:35
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