App Control: Windows Hangs on Startup After Upgrade to 8.1 Agent

Products

• Carbon Black App Control (formerly Cb Protection)

Issue/Introduction

• After upgrading the App Control Agent to 8.1, there is a chance that Windows will fail to boot and hang during the startup process.
• The issue may only occur on 5-10% of boot attempts.

Environment

• App Control Agent: Version 8.1 patch 1 (Formerly CB Protection)
• Microsoft Windows: All Supported Versions

Cause

There is a race condition that has a small chance in that parity.sys will cause a deadlock during the startup process.

Resolution

• The issue has been addressed in the upcoming App Control 8.1 patch 2 release. Please upgrade to this version or higher.