Blackscreen after startup

Briefly describe your issue below:
Before I start: I´m a complete Linux beginner.
I updated my Parrot os 10 yesterday and since then I could not start it again. Every time just before the login page, the screen turns black with just an underline blinking in the left top corner and the mouse cursor also blinking.

What version of Parrot are you running? (include version (e.g. 4.6), edition(e.g. Home//KDE/OVA, etc.), and architecture (currently we only support amd64)
i don`t realy know besides from the version in the advanced boot options where it says version 10.
What method did you use to install Parrot? (Debian Standard / Debian GTK / parrot-experimental)

Configured to multiboot with other systems? (yes)
Dualboot with Windows 10

If there are any similar issues or solutions, link to them below:

If there are any error messages or relevant logs, post them below:

Welcome to the World of Linux & Parrot OS Community
go through this:- Black Screen Issues
maybe you might find your solution

Additional Resources
BEGINNER’S GUIDE FOR LINUX

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