Hello Valentin Ganchev,
Thank you for posting in Q&A forum.
Device drivers are the main cause of win32kfull.sys BSOD errors, especially if your drivers are outdated or incompatible with your hardware. Therefore, we recommend that you update all device drivers first.
In the meantime, it is recommended to refer to the following links, which provide various solutions.
Top 5 Methods to Fix Win32kfull.sys BSOD Error on Windows 10 - MiniTool Partition Wizard
[SOLVED] win32kfull.sys Blue Screen Error - Driver Easy
I hope the information above is helpful.
Best Regards,
Yanhong Liu
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