I made my C partition 100GB thinking that i wouldn't need more than that for my windows and users folder, but it turns out that most of the time i am struggling to keep the 10% needed for the windows to function properly. Now while my User folder takes 18GB which is reasonable my Windows folder takes 39GB. I wanted to see which folders or files inside take the most so i opened it and checked the properties of all folders, a few folders at a time. It showed that WinSxS takes 6.5GB, all the other folders take 12GB and the other files take just a few MB. I then checked to see whether "show hidden folders" was enabled and it was, though there wasn't any transparent folder icon immediately in the Windows folder. Now, there must be something that takes that space, so does anyone knows what it might be? I wanted to search the internet on how to decrease the size of the windows folder if possible, but now that i have noticed this i would like to know what takes that space first.