Hi, so I did a SSD (120gb) upgrade on my dad's old computer, all went relatively fine. I made a C drive partition with the intention this was to be for the OS only, (about 18gb). Rest was divided into another partition, D drive (about 95GB). Now the problem I'm facing is every time I install something, even if I install it to the D: drive, Windows puts stuff in the C: drive, so now its full and I can't install anything. Is there a way to mark C: drive as OS only so that nothing resides there apart from the OS?