1 min. Blackscreen between Windows Splashscreen and Login  

Now I could be entirely wrong but I think maybe the ADW Cleaner picking that Firefox add on is maybe a half a clue as to why you had the issue because from experience the ADW I use only when I have to because it is a reasonably powerful tool picking up stuff that others have missed or purported to have got rid of and worth keeping in mind for future use.
Now the fact that Firefox has been picke up twice now has me suspicious and I am also wondering if you could try another browser instead unless you already have of course.

I use Chrome now simply because the IE and Edge I do not like or trust anymore as I run both 7 and 10 systems.

Ok egon mate I think I shall ask for some ideas on this because whatever I can think of is not working .

Hi,
There have been quite a few kernel mode updates here's just the last two we were talking about,
Microsoft Security Bulletin Summary for September 13th 2016


https://support.microsoft.com/en-us/kb/3175024

• Known issue 1
  
  After you install this update, you may encounter 0xC0000022 NTLM authentication errors. To resolve this issue, see NTLM authentication fails with 0xC0000022 error for Windows Server 2012, Windows 8.1, and Windows Server 2012 R2 after update is applied.
• Known issue 2
  
  Symptoms
  
  Assume that you are running Enhanced Mitigation Experience Toolkit (EMET) on Windows 7 Service Pack 1 (SP1) on a computer on which update 3175024 is installed. When you try to start an application, the application freezes very early in the process and does not completely start.
  
  Cause
  
  This issue occurs because the Export Address table Filtering (EAF) mitigation is active on the application.

Hi,
You can post one of these for the record
Disk Management - Post a Screen Capture Image

Hi,
If I'm translating correctly C has 25% free space left and D has 6% free space ?
How old are the disks ?

Just out of curiosity what is that 500MB partition for? am wondering because usually it is around 100MB how did you prepare this drive for install.
On looking again maybe it it would be worth trying disabling the Bitdefender - cannot lose anything by trying.

Edit Just an afterthought have you tired testing the memory yet? it could possibly have errors slowing it down and if you are going to try this use this because it is the one we recommend

RAM - Test with Memtest86+ - one important thing it must be run for at least 8 passes unless it throws errors quite quickly - a good overnight job I find.