Zulu takes all the resources

I installed Openhab on my Windows PC with Zulu Platform X64 architecture. Also I connected a RFXTRX433XL . Since then my pc becomes slower and slower.
I see that Zulu takes more than 90 % of the processor sometimes more than 97%.
What can I do ?

Welcome to the Community!

What version of java are you running? Is OH running inside a virtual machine?

openjdk version “1.8.0_242”
OpenJDK Runtime Environment (Zulu (build 1.8.0_242-b20)
OpenJDK 64-Bit Server VM (Zulu (build 25.242-b20, mixed mode)

No, OH runs under Windows PRO X64