Microsoft 365 Alert : Service Degradation – Microsoft Teams – Microsoft Teams desktop client inaccessible on Windows 7 – RESOLVED

03/11/2022 13:55:00 PM (BST)

NHSmail Reference : INC32552444

Microsoft Reference : TM455375

Issue Status : RESOLVED

Issue Description : Windows 7 users are unable to start-up the Microsoft Teams desktop client.

More info : Users may receive the following error message when attempting to open the desktop client “A JavaSscript error occurred in the main process”.

While Microsoft is focused on remediation users can access the below links to download the last known compatible versions of Microsoft Teams desktop client on Windows 64bit and Windows 32bit, as a workaround.

Teams Desktop Windows 64bit –
Teams Desktop Windows 32bit –

Microsoft would like to get your feedback on the workaround we provided. From a non-mobile device, please rate this post and submit it in the textbox.

Scope of Impact : Impact is specific to Windows 7 users who have received the latest Microsoft Teams service update.

Final Update : 03/11/2022 14:20:00 PM – Microsoft has completed reverting the offending update and to fully mitigate the issue, we suggest that affected users re-download Microsoft Teams for desktop and mobile via the following link;

Root cause : A latest Teams service update contained a code regression, resulting in impact

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