The "installdir" registry value is either missing or pointing to an invalid directory.

The EventSentry registry contains the "installdir" value that stores the physical location where EventSentry is installed with the setup program, C:\Program Files\EventSentry by default.

This registry value does not affect machines that are only running the EventSentry agent.

If this value is missing or wrong, then you might have troubles updating or using certain features in the ES Management Console. To verify or correct this value, follow the steps below:

1. Start the registry editor (Start -> Run) regedit.exe
2. Navigate to HKLM\Software\netikus.net\EventSentry
3. Locate the value "installdir"
4. Make sure that the path specified in the value points to the directory where EventSentry was installed. If it does not, correct the value accordingly. If the value does not exist, add it as a REG_SZ value and enter the full path to where EventSentry is installed, e.g. C:\Program Files\EventSentry.