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> According to the researchers, an unpatched Windows PC connected to the Internet will last for only about 20 minutes before it's compromised by malware, on average. That figure is down from around 40 minutes, the group's estimate in 2003.

This was from two decades ago, and cursory searching suggests the average lifetime of an unpatched system is even lower now.

https://www.cnet.com/news/privacy/study-unpatched-pcs-compro...