Hi

My Dell OPtiplex 755 SFF- 8GB RAM, Core2Quad processor, AMD 512MB Graphics card does not show the 64 bit versions of OS for Mac/Linux/Win in Virtualbox. I can only see 32 bit versions of these Operating Systems in Virtualbox.

Please let me know what settings have to be set/changed in the BIOS etc so that I can work with VirtualBox  and 64 bit Operating Systems. The BIOS Version is A22 which to my knowledge is the latest one available for the Optiplex 755.

Yours sincerely,

Arvind.