windows:
pre-installed software(much of it you can't delete)
malware prone( i would get malware every time i used the internet)
product key expiration
blue screen of death
no localized account( have to sign into microsoft)
telemetry features
can't customize it to get rid unwanted features
linux:
can supposedly get malware. i have never experienced it.
can customize it to get rid of unwanted features to simply it
open source alternatives to windows software that are 100 times better