Thanks for the quick reply MJS Warlord. These are not the original .NET Framework files I'm trying to clear out, but a copy of them all I saved on an External drive (which is normally disconnected from my PC) that I use to store Acronis & O&O images of the Operating System on. Obviously I don't want to re-format the whole drive, but I could do to reformat the old backup .NET Framework folder as a quick way of deleting them. (If there is a way to format or bulk-erase just a folder of sub-folders that are not normally accessible.).
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