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   Cirka 100+ nye hver dag



   Der kendes over 120.000
    virusser




Virusser
   De kopierer sig selv
   De fylder tit ikke ret meget
   De er ofte svære at finde
   De smitter andre
    programmer
   Nogle ødelægger straks
   Nogle ligger i dvale
Hvad er en virus?
Forskellige typer
      Orme
      ◦ Kopierer sig selv, men lægger sig
        ikke ind i et program. Den spredes
        fra pc til pc (via email). Eksempler:
        Klez og Melissa
      Trojaner
      ◦ Kopierer ikke sig selv men forklædt
        som nyttigt program. Kan slette filer
        eller spionere. Eksempler: Netbus og
        Back Orifice
Forskellige typer

     Bomber
      ◦ Sættes i gang på et bestemt
        tidspunkt. Bruges som
        afpresningsmiddel.
        Eksempler: Chernobyl og
        Magistr@mm
     Hoaxes
      ◦ Ikke en virus. En falsk advarsel der
        sendes rundt via email. Belaster
        diverse pc’er i verden, og folk bruger
        tid på dem.
De ”søde” virusser

    Ikke alle virusser er
     ødelæggende
     ◦ Spiller en melodi
     ◦ En ambulance
       kommer susende
     ◦ Et billede åbnes
De ”onde” virusser

   Visse virusser er
    ødelæggende
    ◦ De sletter programmer
    ◦ De sletter harddisken
    ◦ De ændrer i BIOS
   Pc’en vil ikke starte
   Programmer eller spil virker ikke
   Systemet går ofte ned
   Pludselig mange fejlmeddelelser
   Programmer opfører sig underligt
   Langsom pc
   Mærkelige tegn på skærmen




Har du fået virus?
Nej!



Kan jeg ikke se en virus?
Hvad gør jeg for at undgå…

    Installer et antivirusprogram
    Installer en Firewall
    Opdater det gerne hver dag
    Vær opmærksom på mystiske e-mails
    Pas på med at downloade
    Tjek cd-rom’er og disketter
    Fjern Indholdsruden i dit postprogram
   Installer antivirusprogram
    ◦ www.avast.com eller http://free.grisoft.com
    ◦ eller www.avira.com
 Microsoft Essentials
 Hent rettelser
    ◦ Windows Update
   Slå Indholdsruden fra i postprogrammet
    ◦ Vis  layout  Fjern hak ud for Indholdsrude




Gode tips
Hvad nu, hvis…
          Ingen panik!
          Installer et antivirusprogram
          Opdater antivirusprogram
          Scan din computer

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Virusser maj 11

  • 1. Cirka 100+ nye hver dag  Der kendes over 120.000 virusser Virusser
  • 2. De kopierer sig selv  De fylder tit ikke ret meget  De er ofte svære at finde  De smitter andre programmer  Nogle ødelægger straks  Nogle ligger i dvale Hvad er en virus?
  • 3. Forskellige typer Orme ◦ Kopierer sig selv, men lægger sig ikke ind i et program. Den spredes fra pc til pc (via email). Eksempler: Klez og Melissa Trojaner ◦ Kopierer ikke sig selv men forklædt som nyttigt program. Kan slette filer eller spionere. Eksempler: Netbus og Back Orifice
  • 4. Forskellige typer Bomber ◦ Sættes i gang på et bestemt tidspunkt. Bruges som afpresningsmiddel. Eksempler: Chernobyl og Magistr@mm Hoaxes ◦ Ikke en virus. En falsk advarsel der sendes rundt via email. Belaster diverse pc’er i verden, og folk bruger tid på dem.
  • 5. De ”søde” virusser  Ikke alle virusser er ødelæggende ◦ Spiller en melodi ◦ En ambulance kommer susende ◦ Et billede åbnes
  • 6. De ”onde” virusser  Visse virusser er ødelæggende ◦ De sletter programmer ◦ De sletter harddisken ◦ De ændrer i BIOS
  • 7. Pc’en vil ikke starte  Programmer eller spil virker ikke  Systemet går ofte ned  Pludselig mange fejlmeddelelser  Programmer opfører sig underligt  Langsom pc  Mærkelige tegn på skærmen Har du fået virus?
  • 8. Nej! Kan jeg ikke se en virus?
  • 9. Hvad gør jeg for at undgå…  Installer et antivirusprogram  Installer en Firewall  Opdater det gerne hver dag  Vær opmærksom på mystiske e-mails  Pas på med at downloade  Tjek cd-rom’er og disketter  Fjern Indholdsruden i dit postprogram
  • 10. Installer antivirusprogram ◦ www.avast.com eller http://free.grisoft.com ◦ eller www.avira.com  Microsoft Essentials  Hent rettelser ◦ Windows Update  Slå Indholdsruden fra i postprogrammet ◦ Vis  layout  Fjern hak ud for Indholdsrude Gode tips
  • 11. Hvad nu, hvis…  Ingen panik!  Installer et antivirusprogram  Opdater antivirusprogram  Scan din computer