I wonder if Windows 8 OS file size is smaller footprint when freshly installed? My hard disk needs a bit of cleaning? Does it work?
Windows 8 includes a new option to delete replaced Windows Updates to reduce the size of the WinSxS folder. Run the disk cleanup wizzard and select the option "Windows Update cleanup":
After the reboot the files are deleted from the WinSxS folder.
After doing this, you can save a lot of HDD space and a reinstall is not necessary.