Cannot start the service "Interactive Services Detection" in Windows 8.1 Pro

I'm new to Windows 8.1 Pro and I want to use a security software which worked JUST FINE with Windows 8.1 all the time for a year. But only 3 weeks with Windows Pro the software suddenly stopped working correctly and I saw in the Event Viewer these Errors:

"Immunet 3 is marked as an interactive service. However, the system is configured to not allow interactive services. This service may not function properly."

"The Immunet 3 service terminated unexpectedly. It has done this 9 time(s). The following corrective action will be taken in 900000 milliseconds: Restart the service."

The Immunet 3 service indeed stops now from running every 5 minutes and hence, it's impossible for the security software to complete an hour long full scan without being interrupted after 5 minutes... arrgh !! 

So I tried to start the "Interactive Services Detection" in the Services (Local) but I get this message:

"Windows could not start the Interactive Services Detection service on Local computer.

Error: Incorrect function."

I've googled almost the whole internet to find a fix for this issue but nothing to find about it or the only 'solution' to fix this problem is always something like this here: https://stackoverflow.com/questions/9714732/interactive-detection-service-in-windows-8-beta

But unfortunately changing HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Windows NoInteractiveServices from 1 to 0 does absolutely NOTHING - not even with rebooting, the Interactive Services Detection is still not able to start :((((

And weirdly, the Administrator Command Prompt seems to 'lie' since it tells the first few times it could start successfully the Interactive Services Detection but not according to Event Viewer and Services (Local)and indeed, after testing just a few times more, the Admin Command Prompt finally 'gets it' that it could not start the Interactive Services Detection: 

C:\Windows\system32>net start ui0detect

The Interactive Services Detection service was started successfully.

C:\Windows\system32>net start ui0detect

The Interactive Services Detection service was started successfully.

C:\Windows\system32>net start ui0detect

The Interactive Services Detection service was started successfully.

C:\Windows\system32>net start ui0detect

The Interactive Services Detection service is starting.

The Interactive Services Detection service could not be started.

A system error has occurred.

System error 1 has occurred.

Incorrect function.

For further information I post here the details for the Immunet 3 Event IDs 7030 and 7031:

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

- <System>

<Provider Name="Service Control Manager" Guid="{555908d1-a6d7-4695-8e1e-26931d2012f4}" EventSourceName="Service Control Manager" />

<EventID Qualifiers="49152">7030</EventID>

<Version>0</Version>

<Level>2</Level>

<Task>0</Task>

<Opcode>0</Opcode>

<Keywords>0x8080000000000000</Keywords>

<TimeCreated SystemTime="2015-06-24T07:52:01.402696600Z" />

<EventRecordID>22260168</EventRecordID>

<Correlation />

<Execution ProcessID="732" ThreadID="8308" />

<Channel>System</Channel>

<Computer>Toni-PC</Computer>

<Security />

</System>

- <EventData>

<Data Name="param1">Interactive Services Detection</Data>

</EventData>

</Event>

- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">

- <System>

<Provider Name="Service Control Manager" Guid="{555908d1-a6d7-4695-8e1e-26931d2012f4}" EventSourceName="Service Control Manager" />

<EventID Qualifiers="49152">7031</EventID>

<Version>0</Version>

<Level>2</Level>

<Task>0</Task>

<Opcode>0</Opcode>

<Keywords>0x8080000000000000</Keywords>

<TimeCreated SystemTime="2015-06-24T15:17:40.114987800Z" />

<EventRecordID>22260740</EventRecordID>

<Correlation />

<Execution ProcessID="684" ThreadID="8012" />

<Channel>System</Channel>

<Computer>Toni-PC</Computer>

<Security />

</System>

- <EventData>

<Data Name="param1">Immunet 3</Data>

<Data Name="param2">2</Data>

<Data Name="param3">900000</Data>

<Data Name="param4">1</Data>

<Data Name="param5">Restart the service</Data>

<Binary>49006D006D0075006E0065007400500072006F0074006500630074000000</Binary>

</EventData>

</Event>

Please help me getting the Interactive Services Detection to run, any input and suggestions greatly appreciated!!