If I'm...ummm....listening to my paranoia again and decided to do a clean install of windows 10, and the installation window showed me several partitions and such, should I follow the advice I read somewhere that I should delete all partitions (after backing up anything necessary, which I don't yet have in the PC)? I see one with a total space of nearly 2TB (which is where the windows will ultimately install) and one with almost 4TB, and then a whole bunch of smaller ones (with differing labels). Should I delete all partitions, or all partitions EXCEPT the ones labelled primary? Should I format the two primary ones (cause I don't want something stuck in the windows.old getting me)? If I was to hit delete for the two primary ones (which I won't unless you advise otherwise), what's the worst I could expect? Would it be something fixable?
Also, they installed windows 10 but I don't know if they had internet access and so the key got activated or not, should I hit 'I don't have the product key' for now and then enter it in later (in case it was already activated prior)?
Actually, since I was supposed to have a clean install of windows 10 already, why would I have an MSR (reserved) and system and all that partitions? Shouldn't it just be the two primary ones?
Also, there's no goof I could do that would cause permanent damage or inability to fix, is there? Like say maybe some necessary drivers that must always remain located on a primary drive, or deleting a primary drive and never being able to find it again unless I take it back the PC hardware store again (or ever).
I'm probably being unnecessarily paranoid but.....better safe than sorry?