ClamAV with ClamTk
The ClamAV virus scanner, with ClamTk as a simple window for running scans.
Installs from Ubuntu's own software archive.
Windows Security comes with Windows, so it won't be on a new Linux PC. This free app does the same job, and TuxPick installs it for you.
Install ClamAV with ClamTk with TuxPickIt works on Ubuntu 22.04 and 24.04, and on systems built on them like Zorin OS and Pop!_OS.