Windows has two different System Types, 32-Bit and 64-Bit. The information that shows which System Type you have can be found very easily.
Windows 7 Systems
Click Start Button
In the Search Window, Type: System
In the search results under where it says Control Panel, click "System" to view your System Type
For the line item: System Properties, your System Type will display either 64-Bit Operating System or 32-Bit Operating System.
If you have a 32-Bit Operating System, you'll need to install the 32-Bit installer for Studio One. This file is labeled, PreSonus Studio One 3 Installer.exe
If you have a 64-Bit Operating System, you'll need to install the 64-Bit installer for Studio One. This file is labeled, PreSonus Studio One 3 Installer (x64).exe.
Once you have Studio One 3 Installed, go ahead and launch Studio One 3
Please follow this tutorial on how to activate your installation.
Windows 8 or Windows 10 Systems
Push the Windows Key on your computer Keyboard (located in lower left of keyboard)
In the Search Window, Type: System
In the search results under where it says Control Panel, click "System" to view your System Type
For the line item: System Properties, your System Type will display either 64-Bit Operating System or 32-Bit Operating System.
If you have a 32-Bit Operating System, you'll need to install the 32-Bit installer for Studio One. This file is labeled, PreSonus Studio One 3 Installer.exe
If you have a 64-Bit Operating System, you'll need to install the 64-Bit installer for Studio One. This file is labeled, PreSonus Studio One 3 Installer (x64).exe.
Once you have Studio One 3 Installed, go ahead and launch Studio One 3
Please follow this tutorial on how to activate your installation.