Cannot reinstall OEM version of windows 7 due to a lack of space

simion1

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Jun 6, 2015
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I recently posted a thread about not being able to get past the 'windows failed to start' page after moving my original pc's components to a new case. Link here -http://www.tomshardware.co.uk/answers/id-2672538/newly-assembled-computer-win7-fails-start.html

What i want to know is how can i reinstall windows? My copy of windows is on my c drive which is an ssd. When i go to click reinstall i get an error saying i need at at least 39000 mbs of free space. Surely a reinstall would wipe my c drive clean and replace it with a clean install of windows.

Any help would be much appreciated. Many thanks.
 
Thanks for the response, ill check it out in greater detail but from the link it says something about using a cd but i do not have one. My windows is an OEM, and is a factory iso on my ssd. Also this wouldnt wipe my data on my drives where windows would not be installed i.e D?