NS worked fine after using the upgrade from Win 8.1 to 10. Had a ton of extra junk on this tower, so I reformatted the HDD to do a clean install of Win 10. No problems there, and every other program has installed just fine. The only issue is with NS; Windows will not allow me to install it. It ends the setup program and tells me that NS and NSBU are not compatible with this version of Windows. I did notice that NS tells me the upgraded version of Windows is 8.1-1. I can't install the patches for Win 10 compatibility if I can't install the base program. I looked over the available workarounds and hotfixes, but nothing for this particular issue.