If you are installing from the blue disc, you shouldn't have any problems.
But remember to right-click the install program and "Run As Administrator".
If you are installing from an older Black and White disc, there are a few extra steps to follow.
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Re: Voltage regulation circuit 12V to 5V in 5A range
The 2A wall adapter was a quick fix to be able to continue testing.
Demon Today, 00:27The 9V 2A is holding up for now.