Hi sunil,
please renstall the GUI again other try the below
When rebooting PC BW connection is broken. This message appears <install error> Missing ActiveX component: Business Explorer log on Manager.
The fix is to do Start -> Run (insert) regsvr32 "C:\Program Files\Common Files\SAP Shared\wdtlog.ocx" -> OK. We have to find what is being pushed to PC that affects wdtlog.ocx.
Thanks,
Phani.