The installation folder was detected as C: drive because the key values stored in the registry key are different.

HKEY_CURRENT_USER\SOFTWARE\ej-technologies\install4j\installations
allinstdirs2530-5517-3353-2279
instdir2530-5517-3353-2279

This issue may be caused by using different accounts to install or upgrade Deep Security Manager.

To resolve the issue, do the following:

1. Create a folder named "installation" under HKEY_CURRENT_USER\SOFTWARE\ej-technologies\install4j\.
2. Add the following string values:

   Value name: allinstdirs2530-5517-3353-2279
   Value data: D:\Program Files\Trend Micro\Deep Security Manager

   Value name: instdir2530-5517-3353-2279
   Value data: D:\Program Files\Trend Micro\Deep Security Manager

   Double-check if "D:\Program Files\Trend Micro\Deep Security Manager" is the right path. Otherwise, change the path to the correct one.

   

   Alternately, you can run the following REG command to add the entries without opening registry editor. Make sure to modify the data after.

   >REG ADD "HKCU\Software\ej-technologies\install4j\installations" /v "allinstdirs2530-5517-3353-2279" /t REG_SZ /d "<DSM installation directory>"

   >REG ADD "HKCU\Software\ej-technologies\install4j\installations" /v "instdir2530-5517-3353-2279" /t REG_SZ /d "<DSM installation directory>"

   

3. Restart the Deep Security Manager service.
4. Upgrade the Deep Security Manager.