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Preventive measures against viruses

The risk of becoming infected by a virus or affected by other malware is very high. The spread of malware by email and through websites is today by far the most common form of IT attack.

The consequences of being hit by malware can range from your account or computer being used to spread spam, fraud attempts, or more malware, to having your files destroyed or held to ransom. It is also possible that criminal operations will be carried out and it will appear that you are doing them.

Since viruses are often spread by email, make sure that you know how to recognise phishing and fraud attempts in email.

Preventive measures

  • Keep your operating system and all programs that you use up-to-date. This is particularly important for email clients, web browsers, media players, and all other programme that you use to open attached files, for example.
  • Take special care with attached files and links in email from unknown senders, particularly if they contain attached files.
  • Take special care with attached files and links in email from known senders, since it is very easy to spoof the sender of an email message.
  • Take any warnings that your computer raises seriously, but remember that attackers sometimes create fake warnings about viruses, for example, to trick you into clicking their link.
  • Refuse permission if your computer asks to run a program after you have visited a website or opened an attached file.
  • It’s a good idea to use an ad blocker, since advertising networks are often used to spread malware.
  • Keep backup copies of important documents, and make sure that these are not available directly from your computer. This will enable you to get up and running again quickly if a virus deletes or encrypts all your files.
  • Use an up-to-date antivirus program, but remember that these are not 100% effective. It is common nowadays that malware is adapted to the recipient, which means that antivirus programs often cannot recognise it.

Antivirus programs

Antivirus programs have become less important as malware has become better at foiling them, but it is still a good idea to use one.

The IT Division recommends Microsoft’s antivirus program for use on a PC. It doesn’t receive the best rating in tests, but it is best in ensuring that other safety functions in the system are not compromised.


Contact IRT in the event of any difficulties

Never hesitate to contact the IT security unit at LiU (IRT) if you are the target of, for example, attempted fraud, phishing or a virus infection. We are fully aware that sometimes things simply go wrong, and we want to help you minimise any damage or problems that arise.

Tel. 013-28 17 44

  • spam@liu.se (to report spam)
  • nonspam@liu.se (to report authentic mail erroneously labelled as spam)
  • abuse@liu.se (other matters).

Full contact details of the IRT are available here.

Training for your unit, division or work group

The IRT at LiU offers internal training in IT and information security. Take preventative action and learn more about a specific area, or obtain a general review.

More information about training in IT security


Page manager: david.byers@liu.se
Last updated: 2019-06-18