"You need to restart your computer. Hold down the power button for seve..."

Hello,

I have recently been getting this same message "You need to restart your computer. Hold down the power button for several seconds or press the Restart button." whenever I start up my computer. It happens about 95% of the time. I have been reading on different forums that I should reset the PRam and the NVRam and I have been doing so and it does help as it does EVENTUALLY start up (sometimes takes me 5-10 min. to get it to start up).

I have also read that it may be the RAM that is loose, so I did check that and made sure that the ram is properly placed (which it is).

I don't know what else I can do. Should I reformat and reinstall Mac OS X?

Here is the exact error form the dump:

IOAPIC: Version 0x20 Vectors 64:87
AppleACPIPlatformExpert::start failed
panic(cpu 0 caller 0x55c095): "Unable to find driver for this platform: \"Macbook 2,1\".\n"@/SourceCache/xnu/xnu-1504.9.26/iokit/Kernel/IOPlatformExpert.cpp:1389
Debugger called: <panic>