Forum Discussion

Copper Contributor

Jul 15, 2020

Solved

Outlook 365 suddenly won't open

Hello; Outlook worked this morning, now it won't open, says to open in Safe Mode, but that doesn't work, tries to open for 5 seconds than nothing. Restarted PC and no help. Please advise! Steven F 60...

outlook for windows

Steven_F_603
Jul 15, 2020
RobWill_19
Steven F, original poster here: my Outlook just fixed @ 1:20 Pm pst, I tried it and it opened right up. Hope the same for all of you, maybe 1 at a time! Thanks all.......

Joshua Bowers

Copper Contributor

Jul 15, 2020

We are having the same issue reported from multiple users. ~School District in California

Did your computer recently install updates? If so, which ones?

Steven_F_603

BobMasters

Copper Contributor

Jul 15, 2020

Joshua BowersSame issue with Outlook. Two updates ran today, one after the issue began, the other likely before. 2020-07 Cumulative Update for .NET Framework 3.5 and 4.8 for Windows 10 Version 1909 for x64 (KB4565633) is the last update listed in the history so I assume it ran after the issue began.

2020-07 Cumulative Update for Windows 10 Version 1909 for x64 based Systems (KB4565483) is listed next, and I believe it ran prior to my trying to open Outlook, but I can't guarantee it.