Shortly after I got my computer, I enabled NTFS compression on it, selecting the option to compress "all files and subfolders". I recently noticed that several folders on my PC are not compressed anymore, including "Program Files" and "Windows". I suspect this happened when I installed Windows 8.1. The problem is, the only way I can think of to fix this would be to uncheck the tick box under "Properties" for my drive, thus decompressing everything on my drive, and then re-check it with the "all files and subfolders" option. Is there a way to compress all the uncompressed folders without first decompressing the compressed folders?