Likely it is these 2 files causing troubles.
STOP THE KNOWLEDGESYNC WINDOWS SERVICE
Move MSCOMCTL.OCX and COMDLG32.OCXC:\WINDOWS\syswow64
regsvr32 C:\WINDOWS\syswow64\ MSCOMCTL.OCX 6/6/2012
regsvr32 C:\WINDOWS\syswow64\ COMDLG32.OCX 5/7/1999
START THE KNOWLEDGSYNC WINDOWS SERVICE.