Ok, most is just working fine now!
The only problem I have now is with AMPPS. I could not run AMPPS from within the D (Data Partition) Drive, which is accessible from any installed OS now. If I copy the content to the C Drive, it just will work well in all OS'es. But that would need to have any Script for testing in the different OS'es to also copy into each of the related C Drive. It really would much easier if I could run AMPPS from within the D Data Drive.
I think I'll contact the developer of AMPPS (Softaculous) tomorrow and ask for a working solution.
It's the first time I was trying to use AMPPS from a different drive and not the C Drive.