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Almost nine gigabytes in size: Windows update 24H2 creates an undeletable cache file
(www.digitec.ch)
This is a most excellent place for technology news and articles.
They've done that periodically for years.
I don't dual boot anymore but when I did I kept each installation on a separate hard drive for that reason.
In this case it didn't matter how it's installed
If windows is on a separate drive it's hard for it to actually ruin the Linux install. The fix was to use a USB boot drive to launch Linux and fix the boot manager.