Computer Files–Deleted Does Not Mean Gone

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If you ever decide to sell or donate your old computer, you need to make sure you don’t accidently donate stored passwords, credit card numbers, old tax returns, intimate photographs, financial records, social security numbers, mother’s maiden name, etc. along with it.  A personal computer contains a lot of sensitive information that can potentially be retrieved even if you deleted the files or reformatted the hard drive.

Deleting files removes the information from the directory the hard drive needs to find the data, but not the data itself.  The same thing is true about reformatting your hard drive.  A reformat removes the directions to the information from the directory but not the data itself.  Deleted data is not removed from the hard drive until it is overwritten with new data.   

Deleted information can be restored using data-recovery software.  Data-recovery software looks for data on your hard drive that isn’t listed in the directory and restores it.  This is how law enforcement is able to recover data to solve crimes.  It is also how criminals restore information in order to commit crimes. 

Sometimes, depending on the data stored on the hard drive, reformatting the drive is enough of a precaution. It will keep the average person from retrieving your old information. If you want to go a step further, there are programs that will overwrite your entire hard drive with random numbers. 

Several free programs that do this:

Darik’s Boot and Nuke:  http://sourceforge.net/projects/dban/

Active@ Kill Disk:  http://www.killdisk.com/

Eraser:  http://eraser.heidi.ie/index.php#download

Finally, if you really want to be sure that no data can ever be retrieved from your old hard drive, you can use power tools on it.  You can drill holes through the drive.  You can open up the drive and use sanders or grinders on the platters.  Of course, this method is only to be used if you aren’t planning to donate or sell your computer.

Glenn Caton–Computer Fixx

MALWARE

Signs of Computer Infection

Malware—Is short for malicious software.  It includes any hostile or harmful software or program code.  Examples include viruses, Trojans, worms, rootkits, adware, and spyware.

 How does a computer get malware?

  1.  By visiting a website that has been deliberately constructed by criminals to introduce malware through hidden scripts that form a part of the webpages you view.
  2. By visiting a website that is legitimate but that has been hacked and corrupted unbeknownst to the owner of the site.
  3. By clicking on links inside of emails you receive that have malware inside them.
  4. By downloading anything on the Internet that has malware inside such as some music, games, and pictures.
  5. By downloading or updating utilities such as flash players that have malware inside.
  6. By inserting an infected USB drive into your PC.
  7. By being connected to a network that contains malware.

 

How can I avoid malware?

  1.  Make sure you have all of the Microsoft service packs and updates installed on your computer.
  2. Make sure you have antivirus software installed on your computer.  Make sure you regularly update the antivirus software and allow it to scan your PC.
  3. Make sure you are using a firewall and that it is turned on.
  4. Never agree to download anything on the Internet unless you are sure it is from a safe website.
  5. Never click on links in emails, unless you are sure of where it came from.

Websites that commonly contain malware:

Facebook                                                                                                          

MySpace

Adult Websites                                                                                                

Prescription Drug Websites

Webshots—Picture Downloads                                                                 

Free Stuff—Games, Ring tones, Videos, etc.

Gambling Websites                                                                                        

Fake Antivirus Websites

Music Downloads—Frostwire, Bearshare, Kazaa, Limewire                                                                                           

*Any website where people can share files will have files that contain malware. 

What should I do if I think I have malware on my computer?

Make sure you have all of the latest Microsoft service packs and updates.  Update your virus software and run a full system scan.

If an unknown or suspicious pop-up appears, do not click on the X to turn it off or anywhere else on the pop-up.  Instead, press the control, Alt, and delete keys at the same time.  This will open the windows task manager.  Use task manager to end task on the questionable pop-ups.  Finally, update your antivirus software and do a complete scan with it.

Even if you do all of the above, and take every precaution, you will still occasionally get malware on your computer.  Doing all of the above-mentioned things does significantly cut down on how often your PC gets infections.  You also need to note that the longer the malware remains on your system, the more damage it can do.  You shouldn’t put off getting needed service packs and updates from Microsoft, and you should have a regularly scheduled time when your antivirus scans your computer.

Glenn Caton–Computer Fixx

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