VM Start up error

[ReddoMaou]

hey i've got an error whenever i go to start my vm

"

Failed to open a session for the virtual machine faptop.

Configuration error: Querying "AcpiCreatorRev" as integer failed (VERR_CFGM_NOT_INTEGER).

Result Code:	NS_ERROR_FAILURE (0x80004005)
Component:	ConsoleWrap
Interface:	IConsole {872da645-4a9b-1727-bee2-5585105b9eed}

"

it's a little beyond me to fix any ideas?