Lync 2013 crashes kernelbase.dll

Hi there,

I have already tried all the solutions I could find online, namely disabling bluetooth at BIOS, removing webcam and audio drivers and obviously completely uninstalling Office 2013 (http://support.microsoft.com/kb/2739501) and re-installing it again and I always get the same result: Lync 2013 crashes with the message "Microsoft Lync has stopped working" and it logs the following details on Event Viewer:

Faulting application name: lync.exe, version: 15.0.4641.1000, time stamp: 0x53c5bf4b
Faulting module name: KERNELBASE.dll, version: 6.3.9600.17055, time stamp: 0x532943a3
Exception code: 0xe06d7363
Fault offset: 0x00011d4d
Faulting process id: 0x2c14
Faulting application start time: 0x01cfbe2d4f8b082a
Faulting application path: C:\Program Files\Microsoft Office 15\root\office15\lync.exe
Faulting module path: C:\WINDOWS\SYSTEM32\KERNELBASE.dll
Report Id: 8f72d3e9-2a20-11e4-82a2-002318311053
Faulting package full name: 
Faulting package-relative application ID: 

Any advice / solution?

Thank you and best regards,

Rui Duarte