I have just done a clean Windows 8.1 (64 bit) install on a Dell XPs 12. So far so good in the sense the machine works. However checking Disk Management I see that of the 237 GB hard drive only 35% (83.96 GB) are available. According to one answer on this forum (Windows 8 disk space usage vs Windows 7) Windows 8.1 should only take 8.1 GB or there about. I assume that it has something to do with disk partitioning. Or perhaps something of the old operating system was left on the drive although I am sure I selected the option Not to save any data during installation. I am prepared to start all over since I just reinstalled. As I am a new member you might not see the screen shot of Disk Managemen I am attaching. Thanks for the advice Disk Managment.jpg
In answer to the question I posted. I have run Disk_Clean_up selecting nearly all options since I was on a very new installation and thought that I could afford a system crash. The process seems to have deleted old versions of the operating system from the hard drive (also Window 8.1) giving now a 208 GB Free Space against the previous 83 GB. I will update with any problems if I encounter any. Addendum: I have downloaded and run Spacesniffer, but found it to be a tool for advanced techies and I was not able to really deal with it.
