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: Internal OSC vs Extenal
Thank you all !
DdtWks Yesterday, 14:03I will be using the internal clock for now on. But keeping the external in the design, just in case.