Since the error comes from the below, this issue cannot be fixed by gfx driver that I mentioned unfortunately.
Faulting module name: combase.dll, version: 6.3.9600.16408, time stamp: 0x523d3001
Exception code: 0xc000027b
I will recommend posting the error from event viewer that we saw in the forum, this could help us to categorize the errors we see from skype app launch after upgrade.
I am having the same problem. I upgraded from windows 8 to 8.1, everything works but Skype and a VPN client which I reinstalled and now works.
I uninstalled Skype and reinstalled it and it still does not get past the blue screen with the chasing dots.
Um.... Really this is a Microsoft product.....
Installing the Newest Drivers for my Intel gfx card fixed the problem for me. USe the Windows 8 Driver. https://downloadcenter.intel.com/SearchResult.aspx