Stuck in a restart loop

Hi guys,
finally ditched the pc and bought a mac mini duo core!
Problem is the first thing I done was download the software updates and then install them. The OS told me to restart my machine which I did but now when it boots up it comes up with a message:
"You need to restart your computer. Hold down the power button for several seconds or press the restart button".
If i hold down the power button for a few seconds the mac turns off. Pressing the power button again turns it on but the same message is displayed. Basically my machine at the moment is useless as all i get is the message and cant get beyond that to the desktop!
Where is the restart button? I presume its meant to be a clickable button on the screen yeah? Or is it on the Apple keyboards? (I use a generic non apple keyboard)
How do I get my mac fired up again???

Sounds like you're getting a "kernel panic," a type of system crash usually (but not necessarily) caused by a USB peripheral the system doesn't like. Sometimes KPs are a bad RAM module, and occasionally it's some sort of corruption in the system software. Just a hunch, but in this case it could be the non-Apple keyboard you mentioned.
Go ahead and shut down like you've been doing by pressing the power button for a few seconds. Now disconnect your keyboard and any other peripherals (except the monitor) and hit the power button again. If all goes well and you get to the Desktop this time, then the keyboard or possibly some other USB peripheral you had connected is likely the problem. Give it a shot and see what shakes out.
K.M.
PowerBook G4 (15 FW800); 17 iMac G5; Mac mini 1.42   Mac OS X (10.4.7)  

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