Thanks for your concern, “essexboy”, but don’t care too much, I can live with it.
My autotarts are not that questionable. Nothing that could influence the first boot of the day in such a way.
Attached you see a pic of the autostart list.
True the only one that may be problematical would be Easus
There is an MS programme that sorts the boot files into a logical sequence and optimises the start. You could try that … I have destructions for it
Yes I know about the “Windows Performance Tool Kit (WPT)” and I was working already with it.
But the problem is not generally the boot process being slow it’s just the first boot of the day taking about double the time of any further bootup during the same day.
Every day I will try a new option and when I finally succeed I’ll give you a shout here!
Again thanks for your help and care.
If you find out could you let me know 
I definitely will do that!
Okay, so it might be Dropbox that was causing the issue as it didn’t happen now that Dropbox was removed from autostart.
Is there any fix for this, or does anyone even know why it might happen?
If you can’t run avast together with Dropbox, that’s just really really weird and I’ll have to find some other AV-software.
It is not Avast causing the slowdown but the running of dropbox. When I enabled dropbox to start on my system it goes down to a crawl at start, and this is with Avast not yet installed. But at the end of the day the choice is yours to either have a fairly decent AV or dropbox starting with the system. Personally I can see no need for any programme except the AV to start with the system
Sure, it only happens when Dropbox is on autostart, but it appears to be Avast not booting correctly that is causing the issue. The Dropbox icon (and all of the rest) appears in the traybar, the Avast icon does not.
I just don’t see why all this happened all of a sudden, after having worked perfectly for years…
If dropbox is loading before the Avast GUI and synching as soon as it launches then Avast will scan the files being synched first
Which it has been doing for years since I haven’t changed anything, but it only recently started making a fuss about it… Weird, really weird.
Any way you can flip that order around, so that dropbox loads after?
Start up delayer would be worth a look http://www.r2.com.au/page/products/show/startup-delayer/
@essexboy
I still owe you an answer:
Since the issue was showing only during the first boot of the day the search for the cause was a bit time consuming, just one try per day!
It was all waisted time because 2 day ago my system started on the first boot of the day in the normal 25-30 seconds in the configuration which I started out with. And it still does today.
May be this obscure EM-Update everybody is talking about has something to do with it.
But I tell you what: I don’t have any clue.
Sorry when I disappoint you with this “Solution”. At least I’m happy to have the normal behaviour again! 8)
No problem but emupdater is worth a look at next time I come across this