If Excel Keeps crashing and does not open

Issue first noted with MRoberts on 2/18/26

Troubleshooting steps:

Update Office365 - did not work

Repair Office365 - did not work

Repari Online for Office365 - did not work

Uninstall all versions of office365 and reinstall - did not work

Disable all add-ins while in safe mode - did not work

RESOLUTION - RegistryError correction

1. Start Registry editor. To do this, press the Windows key + R to open a Run dialog box. Type regedit.exe and then press OK.
2. Locate and then select the following registry key:
   HKEY_CURRENT_USER\Software\Microsoft\Office\<1x.0>\Excel\Options
   Note: In this subkey, <1x.0> represents the program version number. 16.0 will appear for versions Excel 2016 or newer
3. In the Name column, look for any REG_SZ value equal to OPEN.
   If you don't find a REG_SZ value whose name is OPEN, continue with the Investigate possible issues with files in Startup folders section.
4. Right-click OPEN, and then select Rename.
5. Rename OPEN to RenamedOPEN, and press Enter.
6. Repeat steps 4 and 5 by adding "Renamed" to the beginning of any REG_SZ value that starts with OPEN. For example, rename OPEN1 to RenamedOPEN1.
7. Start Excel in normal mode.
8. If the issue does not occur when you restart Excel in normal mode, start re-enabling your Excel add-ins one-by-one by removing "Renamed" from the name. You'll be able to identify the add-in that's causing the problem. Remember to restart Excel each time you re-enable an add-in in the registry.