I have Windows 8.1 Enterprise. Enterprise requires a disk / iso for the upgrade, not the store. I am attempting to do the upgrade in Audit mode. Here are some observations i've made trying to upgrade.
Is it advisable to delete any of the folders I listed after the upgrade?
Not sure upgrading in audit mode is supported - or why you would really want to do that anyway.
The Windows.old folder will be automatically cleaned up by a scheduled task after a few days. I'm not sure about the Default.migrated folder; it should be safe to remove it.
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