Original title: Shrink button disbaled
I upgraded to Windows 10 from Windows 8.1. I work on IBM technologies and my software dont work on Windows 10 so i thought of going back to Win 8 but it was too late. hence i decided that i will create another drive and install Win 8.1 on the same but when i start the shrink window, the Shrink button is disbaled. I have 786 GB free on my C drive (921 gb) but no matter what value i enter in the 'amount of space to shrink in MB' it stays disbaled. I need urgent help on this.