Thank you for your quick reply. Apparently nobody has any decent experience with this technology. Before I posted here, I did some extensive search, including this forum. A few posts claimed that it does not work with off-the-shelf M.2 drives from Samsung, others asked if it should be disabled (but hey, nobody said *how* to disable it).
It is also funny how almost every article, including those from Microsoft, talk about Bitlocker keys which are either stored on the ADS (within a domain) or in a Microsoft account. Well, I do not have any of those, mind you! Some article claim that it will only be encrypted, if I use one of the mechanisms mentioned before. Oh yeah? Then why can I access the **bleep** partition only within Windows? Each and every software which I boot from USB either sees nothing (seriously!!) or a "Bitlocker encrypted partition".
Seriously, every articel which seems to have a clue claims that it is right now encrypted with a "clear key" (whatever this is) and that I need to join a domain (nah!) or use a Microsoft account (double nah!). **bleep**? Is this my computer, did I pay for it, or does it belong to Microsoft?
Before you replied (by poining to yet another vague article) I had finally discovered the GUI in Windows 10, where I can decrypt the drive. Or so it claims. As it was already late and decrypting might take many, many hours, I have postponed this for now.
If that **bleep** thing is going to ask me for a key, then I am screwed! I never encrypted that darn thing myself, thus I do not have any f... key!
One thing is sure. I'll never ever pay a small fortune again to buy a "business" notebook from Lenovo, which apparently belongs to anyone but me (who paid for it)!
A very pissed off "customer" (aka pay slave)