One morning we received a call from a frantic homemaker.  She had explained that her computer system seems to slow down dramatically.  From experience, we suspected that it was computer virus related but we couldn’t be sure until we physically saw the computer.  Since she had to take care of her almost 2 years old daughter, there was no way for her to come into the office.  When I met her in person, the real story came out.  She had recently opened an email with an invitation in it.  When she realized what she had done, it was too late.  I was able to install our usual perferred antivirus programs but was not able to do any updates.  After several minutes of configuring, I was able to get all the programs updated and ran a scan of the computer.  One of the program found 38 viruses and malware while another found 17 more.  The computer had Norton Antivirus installed so the customer was confused as to how the virus slipped past the protection.  I had to explain to her that we use at least 3 different antivirus programs everytime we do a clean up because there is no one program that can catch them all.  After a couple of hours, we were able to remove all the viruses and the customer was happy that she doesn’t have to see the error pop-up messege every minute.