Click and allow the process to run (this can take 30–60 minutes depending on your hard drive speed).
While TIA Portal V12 introduced significant performance improvements, V12 SP1 is required for:
: V12 is specifically useful for older S7-1200 (Firmware < 4.0) or S7-300/400 controllers that cannot be migrated to newer versions easily. Automation License Manager (ALM)
Some aggressive endpoint security tools block the background SQL databases that TIA Portal relies on for project indexing.
Always right-click the Start.exe file and select "Run as Administrator."