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: with the pic16f628a off, a voltage on an1 comes out from main voltage pin, why?
ok, since you have two power sources, your options are:
Ioannis - 14th June 2019, 13:531. The circuits above with transistors etc contrlled by the PIC itself.
2. None of the above, just count a year or two and ask the user...