That’s a good MO to have. I was talking about the partitions that Windows does on its own, depending on the version, of course, and the ones that the manufacturer does. For example, Lenovo has a recovery partition with a (supposedly) untouched installer for the Lenovo bloatwared OOTB Windows installation. Since you never plan on using that laptop for that version of windows again, you can just merge all partitions on that drive, and let the Mint installer use the whole drive for its purpose.