https://connect.mozilla.org/t5/discussions/thunderbird-115-2-massively-lagging-on-windows-11/m-p/39928#M14288 <P>Hi,</P><P>I noticed a massive issue after updating TB to 115.2 on my Win11 PC. TB slows the whole system down right to be unusable. A simple mouse click takes up to 1s to have any effect. When TB is closed Windows behaves normal again. I narrowed it down to my two Outlook addresses. After I had to remove them, because of the update breaking somehow my access, the system was quick again.</P><P>Luckily you can't simply revert back to an older, i.e. working, release. So now I can choose between speed and reading mails. Wow.</P> Thu, 21 Sep 2023 19:27:52 GMT SMartin 2023-09-21T19:27:52Z https://connect.mozilla.org/t5/discussions/thunderbird-115-2-massively-lagging-on-windows-11/m-p/39928#M14288 <P>Hi,</P><P>I noticed a massive issue after updating TB to 115.2 on my Win11 PC. TB slows the whole system down right to be unusable. A simple mouse click takes up to 1s to have any effect. When TB is closed Windows behaves normal again. I narrowed it down to my two Outlook addresses. After I had to remove them, because of the update breaking somehow my access, the system was quick again.</P><P>Luckily you can't simply revert back to an older, i.e. working, release. So now I can choose between speed and reading mails. Wow.</P> Thu, 21 Sep 2023 19:27:52 GMT https://connect.mozilla.org/t5/discussions/thunderbird-115-2-massively-lagging-on-windows-11/m-p/39928#M14288 SMartin 2023-09-21T19:27:52Z https://connect.mozilla.org/t5/discussions/thunderbird-115-2-massively-lagging-on-windows-11/m-p/46069#M16599 <P>Same problem.<BR />Fresh install with new profile: With only one mail account, TB slows down extremly. The preview pane holds the content of deleted mails for 1-2 seconds. I'd downgraded to 112 and it's running again.</P> Wed, 29 Nov 2023 13:55:42 GMT https://connect.mozilla.org/t5/discussions/thunderbird-115-2-massively-lagging-on-windows-11/m-p/46069#M16599 Timo-Beil 2023-11-29T13:55:42Z