• User Account Control (UAC) is enabled
• UAC is blocking SageMgr.exe

• Right-click the Sage 50 shortcut and select Run as administrator. Alternatively, you can disable UAC.
• To disable UAC refer to DocLink: How to disable User Account Control (UAC).

DocLink: Error: "There was a problem activating. Please try again later." or "There was a problem with the activation files for Sage 50."
DocLink: User Account Control (UAC) is asking if Sagemgr.exe can make changes to this computer

[BCB:161:Chat 50 US:ECB]