Your computer can become infected by malware if you:

  • Visit a website that attacks your computer
  • Use a USB drive infected by malware
  • Open an email attachment containing a virus
  • Are tricked into opening an infected file
  • Haven't been installing updates (patches) regularly
  • Aren't running anti-virus software

Your anti-virus program should notify you if it has detected or blocked malware or if your computer has been infected. But if your computer starts behaving strangely it may have been infected by malware. Common symptoms include:

  • Pop-up web browser windows appearing frequently
  • Ending up at different websites to the ones that you wanted
  • New toolbars being added unexpectedly to your web browser
  • New icons appearing unexpectedly on your task tray
  • The default search engine in your browser changing suddenly
  • Your homepage changing suddenly
  • Certain keys, such as the tab, stop working in your browser
  • Random Windows error messages appearing on your screen
  • Your computer suddenly taking much longer to do regular tasks such as saving files, opening programs, starting up. or shutting down

All University-owned computers are required to run Sophos Home. To confirm whether your computer has anti-virus software installed contact your departmental IT support staff.

If you need any assistance installing or removing an anti-virus program, or if you are worried about malware on your computer, please contact AskOtago:

Freephone 0800 80 80 98 (within New Zealand)
Tel +64 3 479 7000

Further information

Installing and using anti-virus software

Last updated 26/10/2021 02.13 PM

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