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Switching between applications with alt+tab is sometimes really really laggy. Nothing happens for a couple of seconds, then all of a sudden, all keypresses are processed at once, causing the windows to switch around in a quick succession.

I'm not sure if it's any of the applications I run (VS Code, Slack, Outlook, Spotify, etc) that is causing this, or one of the many many corporate bloatware I've been forced to install.

How can I debug this and figure out what is causing the lag? I've thought about something like ProcMon but I don't know if that's a good fit?

Any help would be appreciated!

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    Ask your Comapny about what they installed. Try a clean boot with nothing runing and check Alt Tab. Then add apps to the boot sequence.
    – anon
    Commented Sep 28, 2021 at 10:41
  • It's most probably Windows itself of video card drivers are lagging. For troubleshooting you can check event viewer but I don't belive you can find much there. Try to use Win+Tab instead
    – Hardoman
    Commented Sep 28, 2021 at 12:26
  • Same thing happens to me, but only when Windows Terminal app is running. Go figure. If i hit alt-tab furiously enough, windows desktop restarts - i can see all UI disappearing with only bg left for a sec - and problem is gone. All seems to be working OK after that.
    – user124
    Commented May 26, 2022 at 20:09
  • Killing the Cortana process seems to be working for me
    – Joel
    Commented Oct 24, 2022 at 5:41

1 Answer 1

Reset to default
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Disabling News&Interrests helped in like 80% of my app switches, making them instant as expected.

There are still occasional several seconds lags though. Restarting the explorer.exe process seems to help sometimes too, but that's quite inconvenience. I got 64GB RAM, so should not be a swapping issue.

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