If you install an SP1 version of the 8.6 engine, it will replace any existing non-SP1 8.6 installation. System Requirements for Version 8.6
You can have multiple versions of the Run-Time Engine (e.g., 8.2, 8.6, and 2011) installed on the same machine without conflict. Performance and System Requirements labview runtime engine version 8.6
is the specific set of libraries required to execute applications built using the LabVIEW 8.6 development system. If you install an SP1 version of the 8
While the full 8.6 development environment recommends 1 GB, the Run-Time Engine requires only 64 MB minimum (256 MB recommended). Supports a minimum resolution of 800 x 600 pixels Requires minimal disk space for temporary file storage. Deploying Your Application labview runtime engine version 8.6