It is important that your computer or device is protected against computer viruses and malware. Apple devices do not normally require any extra protection, Google Chromebooks have multiple levels of security built in and Android tablets and smartphones are protected by Google Protect software.

Microsoft Windows 10 has anti-virus software built in which is in the form of Windows Defender (see https://www.microsoft.com/en-gb/windows/comprehensive-security). Some people like to install additional anti-virus and anti-malware software which you can pay for, or there are some free software options which have good reviews – see, for example, https://www.avg.com/en/signal/best-free-antivirus-software.