FLStudio program will be unlocked/registered.
See this Knowledge Base article for a pictorial Step-By-Step tutorial on installing your registration code.
When you install the latest FLStudio demo version on your PC it should then be unlocked/registered ...
FLStudio error, but a Windows error.
First check if you can start the regedit.exe - Windows registry program manually:
1. Go to the Windows Start menu 2. Choose Run... 3. In the Open field, type Regedit.exe and click ...