Can't decrpyt 2nd drive after windows upgrade

[Matthias]

Hi,
this is the origin situation:

Laptop with Windows 10. 2 Drives, SSD + HDD. SSD has System partition, HDD has data partition.
Complete system was encrypted. (late 2017)

Now Win 10 upgrade was required, so i decrypted the SSD permanently. That worked flawless.
I upgraded Windows 10. That worked flawless.
Now i can't access the HDD anymore. Partition manager shows a Raw partition. Tried to mount it, which didn't work.

Before the update i never had to enter a password for the HDD, so i guess the same password was used.
I can't decrypt the HDD with the Password i typed or pasted in correctly.
I ruled out typos.
I ruled out keyboard layout issues.
I tried decrypting with any combination of options available.
I tried decrypting with the rescue disc.

I always get the message 7336.

Can you help me?

[Enigma2Illusion]

Windows OS installations and upgrades will sometimes perform a quick format of connected drives that it sees as RAW to make the drive usable for Windows. The Windows quick format will overwrite the VeraCrypt primary header.

In VeraCrypt, try mounting the HDD using the optional setting of embedded backup header which is located at the end of the VeraCrypt volume.