SAPGui closes automatically while Excel calculation

Hi all,

we have some troubles with SAPgui 7.3 / patch lvl 7 while using Excel 2010. All SAPGUI sessions close without any alert while Excel file is being recalculated. I´ve checked windows task manager and CPU usage is 100% while Excel recalculation.

I know about 3 computers with the same issue within our dpt. All of them have same configuration Windows 7/64bit, Office 2010, SAPGui 7.30/patch lvl 7

Any idea how to fix this , is there any patch for that  ?

Thanks

Petr