MEBx Error after cmos battery replacement

Hi,

My PC is a Fujitsu mod ESPRIMO P7935 (D2812-A2x) ,Serial: YL1B003165, Bios vers: 6.00 R1.20.2812.A2, o.s.: Windows 7 x64

After battery replacement, after every boot i see the attached error.

If i press a key , Windows will be loaded and run all fine.

I tryed update (again) the bios without success, the function CTRL  P has not effect

I don't use AMT, i I looked for a option in the bios options like "disable AMT" without success

This isssue is for me very serious because this Client is unattended and i can't reboot remotely

Some suggestions?

Thanks very much!!

Luciano