If none of these steps resolve the issue, you may want to reach out to Slack support or check their status page for any known issues.
Slack freezing on Windows 11 is a known issue often triggered by conflicts between the app's hardware acceleration and system drivers, or issues with the Windows Notification Service. slack freezes windows 11
To solve a problem, you must first understand its origins. Slack is an Electron-based application—essentially a web page wrapped in a standalone browser shell. While this allows Slack to run on multiple platforms, it also inherits the memory and rendering challenges of a browser. Windows 11, with its new windowing system, advanced security features (like Virtualization-Based Security), and updated graphics driver model, can expose the cracks in this architecture. If none of these steps resolve the issue,
Click the (☰) in the top-left corner of the Slack window. Select Help > Troubleshooting > Clear Cache and Restart . Click the (☰) in the top-left corner of the Slack window
Until a native, non-Electron version of Slack arrives (which is unlikely), Windows 11 users must manage their environment. The most reliable long-term strategy is often the simplest: Browsers have superior process isolation and memory management. While you lose native notifications and system tray integration, you gain stability.
Users have reported that Slack suddenly freezes, becoming unresponsive, and sometimes even crashes on Windows 11. This issue can occur at any time, whether during a conversation, sending a message, or simply having Slack running in the background. The freeze can last from a few seconds to several minutes, causing inconvenience and delay.