Windows not booting

There are often many reasons why windows is not booting. I believe this will be the first of many other parts to "Windows not booting." Anyway to get to the problem, someone mentioned that they had quite a few files on their hard drive and wanted to do some "spring cleaning." Turns out , that person went around deleting various files from the hard disk and ended up downloading some software from the net to help further the random deletion. It turns out after a restart the system would not boot.

Originally someone thought the problem would be that since the questioner had many files that maybe the system is not booting because the hard disk is full. However that would be incorrect given that windows sets aside a part of free space for emergency. So therefore windows would still boot but go into a emergency disk clean up environment and force the user to free up some space.

It would seem then that the real problem is the fact that the user went around deleting random files which could have been some system files. Basically users would often ignore deleting crucial system files (from the system, system32 folders) but using third party software, specifically those "software from the net", could have been the culprit that deleted crucial files. Therefore the solution would be to reboot into recovery console via the windows set up disk, and then restore windows stock settings.