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Securing your computer

5 minutes to read | Last updated June 15, 2022

UW–Madison’s Electronic Devices Policy (Source: requires campus members to keep their operating
system (OS) and applications up to date, run antivirus software and, whenever possible, maintain a dedicated firewall.

Follow the best practices in this guide to protect yourself — and to contribute to a safer computing environment for everyone.


If you work on a computer owned by UW–Madison, check with your department IT administrator
before installing software or reconfiguring it.

If you are a student or you access UW resources from a home or other computer, please follow the steps below.

Follow these steps

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Keep your operating system (OS) and versions up to date

Keep your computer’s operating system up to date

Why? Developers or others often discover vulnerabilities, or weaknesses, in a computer’s operating system (OS) or applications. These vulnerabilities provide hackers an opportunity to create malicious software (e.g., viruses, ransomware, bots, adware, worms, Trojans, etc.) that can infect your computer and steal your personal information. To counteract this, a security update (also called a “patch”) is created to fix these vulnerabilities in computer software code. So, it’s important to keep your OS and security patches up to date. Simply running an antivirus program is not enough.

How do I keep my computer updated?

It’s easy to configure your computer to automatically download and install security updates so that you don’t have to remember to do it manually. In most cases, the updates will install in the background, and you will not be asked to download and install anything. Once set up, it should be easy to ignore those fake updates or pop-up notifications generated by hackers.

How to update Windows Security Patches (Source:

How to update Mac Security Patches (Source:

Install and run free antivirus software

Faculty or staff:

  • For personal Windows devices: UW–Madison recommends you use Windows Defender (Source: Windows Defender is a built-in antivirus app which is automatically installed on Windows devices.
  • For personal macOS devices: Use Trend Micro (Source:

Students or emeritus:

  • For personal Windows devices: UW–Madison recommends you use Windows Defender (Source: Windows Defender is a built-in antivirus app which is automatically installed on Windows devices.
  • For personal macOS devices: Use freely available antivirus software (Source:

What do I need to do?

Use a firewall

A firewall is software that runs directly on a computer and protects it against attack from the network by controlling incoming and/or outgoing network traffic. Most operating systems have built-in firewalls, but you need to make sure they are turned on.

Instructions for enabling your firewall (Source:

Protect your NetID & password and multi-factor authentication credentials

Passwords are like passports or a blank check; if lost or stolen, they give hackers a world of opportunity by providing access to your personal, financial or work data. The campus Password Policy (Source: helps you select strong passwords and manage them so you can protect your identity and University resources. Once you’ve read and understood the password policy, update any campus passwords that do not meet the standards. If needed, go to change your NetID password  (Source:

To help manage your passwords securely, consider using a password manager. Learn more about a free one available to campus members at Password Manager – LastPass Enterprise (Source:

A few don’ts

  • Never share your password or multi-factor authentication credentials with anyone, not your boss, not your family, not your co-workers. Doing so is against UW System Acceptable Use of Information Technology Resources Policy (Source: and violating it could result in suspension or criminal prosecution.
  • Never use your NetID password on any other website. If you have done so, immediately change your NetID password (Source:
  • Don’t reveal a password in an email message.
  • Don’t talk about a password in front of others.
  • Don’t hint at the format of a password (e.g., “my family name”).
  • Don’t reveal a password on questionnaires or security forms.
  • Avoid writing passwords down, but if you must, store them in a secure place (e.g., a locked file cabinet).
  • Passwords should never be stored unencrypted online.
  • Do not use the “Remember Password” feature of applications (e.g., Firefox, Chrome, Safari, etc.).
  • Don’t use the default password if one is provided (hackers can locate a default password easily). Change it immediately to a new, stronger password.
  • Don’t reuse old passwords. NetID passwords cannot be reused within a 12-month period, and passwords cannot be changed to any of the previous three passwords.

Install FREE WiscVPN to secure your wireless connection

WiscVPN software encrypts internet traffic between a home/remote personal or work computer and the campus network, allowing you to use the internet securely on open networks. It’s offered free to UW–Madison faculty, staff, and students. Learn about WiscVPN – How to Install, Connect, Uninstall, and Disconnect WiscVPN Palo Alto GlobalProtect (Source:

Get help!

The DoIT Help Desk (Source: can answer your questions or connect you with the right group.


Report phishing and other abuse

If you encounter a suspicious email that claims to be from UW–Madison and requests any personal information, do not respond to it or click any links! Instead, click on the “Report Spam” or “Report Phish” located on the top right-hand corner of your O365 email account and in the “… ” at the top of the page in the most recent version of O365.


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