Hi! first time on the forum

I have a question about "win64 trojan-gen" that I launched by mistake in Windows Sandbox (without antivirus in it)
the whole pc has bluescreen with the error "system thread exception not handled", accompanied by a mush of random pixels on the second screen and a melodious song worthy of the best bluescreens (this sound is not caused because of the ram, is it?)
after restarting pc avast blocked a connection (to url:botnet) and quarantined an item
restarting windows sandbox was very slow (like the first time)
I ran a scan on avast, other than that should I be careful to do other things?
actually i'm scared to restart my pc and run into ransomware haha
Thank you very much for your time