Teams Desktop Client Fails on Some Windows Machines, Microsoft Investigates

Microsoft is investigating an ongoing issue that's causing some Windows users to experience significant delays or outright failures when launching the Microsoft Teams desktop client. The company has acknowledged the problem, which has been tracked internally as TM1466820, and confirmed it remains unresolved. According to Microsoft's incident notice, affected users encounter trouble specifically during the first launch of Teams on a Windows device, with some unable to load the client at all while others experience delays stretching up to two minutes before the app becomes usable.

For an application many organizations rely on for daily communication, even a two-minute hang at startup can disrupt morning routines, delay meeting joins, and frustrate employees trying to check urgent messages. Microsoft has classified the issue's scope as affecting 'some users' within impacted organizations, particularly those opening Teams to view new messages.

While a permanent fix is being developed, Microsoft has recommended workarounds to keep productivity moving. Affected users can switch to Microsoft Teams on the web through a browser or use the Teams mobile app, both of which reportedly remain unaffected by the desktop client's loading problem. These alternatives don't fix the underlying issue but let employees stay connected until Microsoft rolls out a resolution.