Computer security

Security - Windows operating systems

The chance of  any of the following undesirables finding their way onto your hard drive can be greatly reduced by installing the FREE programs listed;

  • Spam [unwanted commercial emails often with false details]
    • spammers send millions of emails every day
    • they get your email address any way they can
    • they usually falsify the 'from' and 'reply-to' email addresses
    • they don't want a reply from you, including complaints!
    • they often forge the email headers not to be traced
    • they often use DSL/broadband connections or relay via other servers
    • their mission is the weblink in the email you get
    • click on that link and the spammer gets paid
      • don't click on the weblink, deny them payment
    • spammers are the agents for the website owner
    • they may get commission on products + the click fee
    • unsubscribing just confirms your email address to them!
  • Viruses [malicious programs for causing data loss and worse]
    • usually designed to cause disruption to your computer
    • often sent as an email with an attachment
      • don't open the attachment
  • Trojans [programs that try to gain control of your computer]
    • robot programs that install themselves on your hard drive
    • often sent as an attachment with an email
    • often use random file names to avoid detection
    • sometimes use Windows filenames but in a different folder
    • they sit and wait for instructions from the owner
    • they can be commanded to send spam emails from your PC
  • Worms [programs that scan selected ports to gain access]
    • most internet connections use TCP and UDP protocols
    • there are ~65,500 different ports [channels] on each!
    • viruses and trojans often work on one particular port
    • worms search computers with an open port [door]
    • hackers can then use it to access your computer
      • use a firewall to close unnecessary ports [doors]
  • Spyware [program transmitting your internet browsing habits]
    • reports back information about your web habits
    • used in gathering statistics for targeting advertising
  • Keyloggers [software for recording & transmitting keystrokes]
    • hacker's program that tells them the password you type
  • Pop-ups / Pop-unders [advertising windows on your browser]
    • adverts in a different window to that which you are using
    • annoying more than anything, can be blocked
  • Zombies [infected computers controlled by spammers / hackers]
    • infected PC for the use of hackers or spammers
    • especially useful when the PC is on-line 24/7 with DSL
    • used in co-ordinated attacks against specific servers

Visit the following websites and download a copy of the FREE software. Install it and do yourself, and the rest of the internet community, a favour.

For more specialist use in investigating offenders, try;

Email postmaster@ snowdonconsultants.com re bugs. Copyright © 1995 to 2008 Snowdon Consultants Ltd