To say anything, then more information on the events that are in event viewer, i.e. all the detail there is are needed.
These errors can be raised by many processes/services running on the PC.
The tbbLoaderService is run automatically, to start the tbbMeter.exe process. Between the service starting and exe running, we wait for a few other windows bits to start, and then add a few more seconds before starting tbbMeter. This waiting is done in a concurrent manner, so should not unduly slow down any other start-up processes.
If you dont use tbbLoaderService to start tbbmeter, then you would need to grant it UAC rights every time it runs. You can temporarily disable the service if you want, and see what difference it makes.
What AV/Firewall software are you running? As the delay may be that software checking that nothing untoward is going on.