My computer has a virus

If you have gone to a dubious webpage, opened a suspicious document or are seeing strange activity on your computer, you should check your computer for viruses, also referred to as malware. 

How to spot malware and prevent future problems

These are simple precautions you can take if you have the slightest suspicion your computer or other device might be infected.

University Windows computers

University Mac computers

Home (personal computers)

We list recommended antivirus and antimalware programs on our Free software page. You can install MalwareBytes and use it as above.

Mobile devices

If you are worried you have malware, you can back up your data (photos etc) and then format (reset) the device. Android devices have antivirus apps available, e.g. Avast Antivirus. Apple devices currently do not. See also Prevention (below).

How can I prevent this happening in future?

My computer is definitely infected, what should I do now?

Computers and other devices

For University-owned Windows computers and personally-owned Macs:

  1. Do not use the infected computer for anything important until the following steps have been taken.
  2. Assume your passwords have been compromised. On a different (clean) computer, change your passwords (starting with online banking if relevant). See [phished!] for changing your University password.
  3. Run Malware Bytes as above, but use the slow scan. This may take a few hours.
  4. If it finds a problem, restart your computer and run it again.
  5. If it found more problems in the second scan, the malware needs more attention (see below).

For University-owned Mac computers:

  1. Do not use the infected computer for anything important until the following steps have been taken.
  2. Assume your passwords have been compromised. On a different (clean) computer, change your passwords (starting with online banking if relevant). See [phished!] for changing your University password.

For home computers:

  1. Scan using Endpoint Protection. It will remove what malware it can.
  2. If Endpoint cannot remove or quarantine all the Malware, or symptoms remain, contact the IT Service Desk.

Web browsers

If the problems appear in your web browser, you might need to remove an unwanted plugin or extension. You can do this by resetting your browser settings:

Note that this will clear your home page, stored passwords and other browser settings.

Further support

If the advice above does not resolve the issue, or you are unable to follow it for any reason, seek further help immediately: