MS Surface Pro 3 Hard Drive Full?

We have Surface Pro 3 tablet with a 256 GIg Hard drive.  It runs W8.1 64 bit, 8 gigs memory and Office 2013.  This 256 Gig hard drive is reporting that its almost out of space.  Program and user files included, it should be showing over 100 gigs of free space.   Yet it reports it has only 500 megabytes left.   What could be causing this?
Drew LakeAsked:
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Thomas GrassiSystems AdministratorCommented:
how much virtual memory is assigned?  that will not show in your totals

also search for *.dmp   files
Seth SimmonsSr. Systems AdministratorCommented:
try running treesize to see where the usage is
Drew LakeAuthor Commented:
Will do.  I'll report back on this.
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Seth SimmonsSr. Systems AdministratorCommented:
any update?
Drew LakeAuthor Commented:
Hello All - it appears that the PC was in fact encrypting, even though Bitlocker reported it was 100% complete.   It stopped on its own and the available space on the C drive went back to normal.

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Drew LakeAuthor Commented:
The issue resolved itself.
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