inexplicably I was experiencing regular freezing with TeXnicCenter 2.02 64Bit on a Windows 8.1 Pro Update laptop, using MikTeX 2.9 64bit as well as SumatraPDF as a viewer.
(Post processing is set up for the nomenclature package and glossary package)
-> Reinstallation of TeXnicCenter has not resolved the issue.
-> Reinstallation of MikTeX did not solve the issue.
The issue was not present from the start (when I first installed TeXnicCenter 2.0.2 64Bit), I suspect it may relate to some runtime or similar which received an update at some point.
A temporary workaround which works for me is using the 32Bit version of TeXnicCenter which has no problems.