Windows 8.1 Chkdsk scan process is hanging.

[Arcturus Fyr]

Today I've tried doing a Chkdsk scan on my primary drive. Through the console, I entered this line to start the process on a re-boot 'chkdsk /f /r c:'. 

I afterwards left it to do it's work for the next 1 and half hours '6:40-8:10pm', during this time I went to check on the progress of the scan and what I saw was that it was only '10%' into completion, this confused me greatly as previous computers that I have owned would atleast be around 70, or 80% percent completed, so not knowing what to do, I did a cold-boot.

From what I can tell, no visible damage has afflicted the said drive I did the chkdsk scan process on, but I would still very much like to know why my scan is hanging.

Please respond as soon as possible.

Thank you in advance.
-Arcturus Fyr