What are the prerequisites for SAP GUI 740 and NWBC 5 to work?

I have upgraded from SAP GUI 730 and NWBC 4 to SAP GUI 740 and NWBC 5 respectively. But both are not working. GUI window and NWBC windows are not working. I end up killing the program through task manager. Are there any prerequisites to make both these work? My laptop has 32 bit Windows 7 OS with MS Office 2013. It has Intel processor i3 with 4 GB RAM
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Any urgent help will be really appreciated.

Regards,

Gireesh