Editing Downsides of Windows (section)

=== Malicously-intended software ===

Windows setups are often infected with various types of malware, viruses, worms, backdoors, trojan horses, spyware, ransomware and adware, and often many of the above at the same time.  Over all there have been billions of malware infections on Windows computers.  

There are over 35 000 variants of viruses for Windows.  There are 37 for Linux (and most of them don't work due to security enhancements).