Thanks for your message and excuse me for the troubles.
To be honest, sounds interesting as I suspect the "service not installed or being used by another program" message is not really related to Hard Disk Sentinel. Hard Disk Sentinel should display no such messages at all. Maybe a Windows component is not installed or does not work as expected (?)
I'd recommend to send an image (screenshot) to
info@hdsentinel.com as seeing the window may give some ideas, thoughts.
What do you see if you manually initiate the update by the automatic updater from File menu?
Do you see the same?
Anyway, you can any time update to latest Hard Disk Sentinel Pro version this way:
1) completely close the current version by File -> Exit
2) download the latest Hard Disk Sentinel Pro installer from
http://www.harddisksentinel.com/hdsenti ... _setup.zip
(note this link always points the latest Hard Disk Sentinel Pro version, 4.71 in this case)
3) without uninstalling the previous version, install this new version to the same folder where the previous installed.
This way the program files will be updated and the new version will automatically use all settings, statistics, logs, registration details - if the previous version was registered and activated with your license.
Please note that if you had a special, promotional license, then the updated version may switch back to unregistered version and may no longer accept the original license.