Hello, when I install a Windows (any version) 64 bit version I can't run it. Can only run 32 bits.
I've changed my CPU from a E4500 to a Xeon L5410, which both support 64 bits, but with this new one I can't. My motherboard is a G41M 775 board.
It shows the error code 0x000000c4 when booting the system trying to run a 64 bits version, but with 32 it works "fine" (it's slowler, obvious…).
I have checked everything and works well. Maybe I have to update the Bios but don't know what to do or if I might need any specific step or update.
The L5410 may support 64bit windows, but the L5410 is not supported by your board:
In fact, they are different sockets:
However, your E4500 does support 64-bit, so just switch back to that processor.
If the BIOS doesn't have support for a particular processor, then you simply should not use it. The supported processor documentation would take into account all available BIOS updates, so there is absolutely no chance of there being a BIOS update that fixes this. If you can return this processor for refund, you should.