TeamsFixer
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Teams runs slow or hangs

Teams feels sluggish, eats RAM, or freezes briefly. These are the most effective levers for performance.

Last verified:

Affected systems

windows macos

Quick fixes

  • Switch to the new Teams client
  • Toggle hardware acceleration in settings
  • Clear cache and minimize add-ins

Switch to the new client

The classic Teams client (Electron) is significantly slower than Teams 2.x. If IT allows the choice, enable ‘Try the new Teams’ in settings - it uses a lot less RAM.

Hardware acceleration

Some GPUs benefit from hardware acceleration, others get worse. Try both - Settings, General.

Clear cache

A bloated cache is the most common cause of slow starts:

%appdata%\Microsoft\Teams

The first 30 seconds after reset are slow (sync), after that Teams runs noticeably faster.

Drop unused teams

Each team costs RAM for the channel list. Walk through your team list, hide or leave teams you no longer use.

RAM hunger in the background

Teams keeps running after close. In Task Manager check if several ‘Microsoft Teams’ processes are alive. Kill them all and relaunch.

Antivirus

Some antivirus tools scan every Teams operation. Adding Teams as an exception in the antivirus settings can cut latency in half.

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