Hello, we are very sorry about these issues. Would it be please possible to create memory dump of Avast service from such a moment (dns not working, Avast svc consuming a lot of CPU). The dump can be created by right mouse click in task manager, but please do not forget to disable the self protection in troubleshooting section, otherwise the computer deadlock might happen. Please upload dump to Avast FTP and provide here the file name. Thank you.