After reinstalling everything, the problem still persists , and strangely looks like graphics issue...

Problem:
1) at Larian startup screen (through steam), i get a red warning triangle telling me:
"We've detected a data mismatch..."
2) ignoring above warning, when starting the game anyways with power cable attached, it is crashing right after selecting video type Vulcan with several Larian popup windows (invalid data and file verification issue), while it is working after selecting Directx, however with DirectX i get a resolution distortion (screen too broad)

System: virgin (brandnew) laptop (Nvidia GeForce RTX 3060 6GB, Windows 10 home).
No other programs installed.
Steam installation w/o problems.
First installation of BG3 was done right after patch7 release.

After receiving the issue from above i followed the advices (verified integrity of game files through steam, no Files named Patchxxxx in my BG3 folder, no mods installed ever), i deleted BG3 and started a new download.

No change.

what is very strange : When disconnecting power cable i can play the game also on Vulcan (with correct screen width, on directx it is still set too broad).

deleting the Larian Studios folder in appdata (like adviced in the former post) did not help, i had to make another profile and received warning/crashes again

any ideas how to continue? (already contacted Larian in their bug/ticket service)