Facebook video calling / chat does not work after windows 8.1 PRO upgrade / update

Hi,

I originally had windows 8 PRO where facebook calling was working fine.

I upgraded to 8.1 PRO on 17th, since then am unable to see the Facebook video calling button. I also frequently get the msvcr110.dll was not found error.

1. I have tied all solutions posted on this forum like do a clean boot, uninstall - install etc.
2. Microsoft Fix it page says "We're sorry, but your operating system is not supported by Microsoft Fix it at this time."
3. Tried running in compatibility mode.
4. I even tried downloading .net frame work and C+ redistribution, but it says system already has the latest software.
5. I also see some event errors in the event logger:

Faulting application name: FacebookVideoCalling.exe, version: 1.2.0.287, time stamp: 0x50775885

Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000

Exception code: 0xc0000005

Fault offset: 0x3cca0b4f

Faulting process id: 0x1f68

Faulting application start time: 0x01cecb51b2458965

Faulting application path: C:\Users\prafu_000\AppData\Local\Facebook\Video\Skype\FacebookVideoCalling.exe

Faulting module path: unknown

Report Id: f054c40f-3744-11e3-8251-240a646ebdc3

Faulting package full name:

Faulting package-relative application ID:

Please help...