Finally managed to uninstall immediately after a forced shutdown and restart. This is crazy .... the service suddenly jumped to 80% of my RAM and was spiking my CPU to 40%. Maybe I'll reinstall some other time but if this is what Malware Bytes calls QC, I'll pass on using their software.
Same situation here .... Malware Bytes service RAM suddenly jumped to 90% of memory and CPU was spiking to 40%. My system kept crashing. Ended up having to uninstall Malware Bytes to recover my system.