Windows 11 version 23H2 or above. (Older versions like Windows 10 21H2 and below are no longer supported for new downloads). iOS/iPhone: iOS 17 or above.
Security software like Kaspersky or Windows Defender can sometimes flag the Slack installer as a false positive or block the connection to Slack’s download servers. Issues connecting with Slack (port 443 problems) why can't i download slack
Check for system updates in your device settings. If your hardware is too old to update to these versions, you may need to use the Slack Web Browser Version instead. 2. Firewall or Antivirus Interference Windows 11 version 23H2 or above
Why Can’t I Download Slack? Top Reasons and Fast Fixes If you're stuck staring at a "Download failed" message or can't find Slack in your app store, you aren't alone. Slack regularly updates its security and system requirements, which can suddenly leave older devices or unpatched systems behind. Security software like Kaspersky or Windows Defender can