Hello all. I am in quite a predicament here. I recently installed Win 10 because it was time to reformat and I figured that an upgrade from win 7 was a good idea. After installing and using win 10 for a few days I decided it was not for me and used the system reset function on win 10 to wipe the hard drive. After the wipe was finished, instead of letting win 10 install itself again, I booted from a win 7 disc instead and reinstalled win 7. Things seem fine now but there are certain quirks (such as screen resolution restrictions) that are lying dormant from win 10 still existing on the hard drive. TLDR: How can I completely wipe all traces of win 10 from my hard drive using win 7? Initially the boot menu gave me the option to use win 10 or win 7 but now it does not so I am a bit confused. Any help is appreciated. Thanks very much for reading.