Forum Discussion
Can't edit cells in Excel 2010 since Sept 2026 patch Tuesday
I can't edit cells in Excel 2010 spreadsheets since Sept 2026 patch Tuesday. How do I reverse this back to the former working software. There was one comment that said it might be caused by a Windows 10 security update. Since Windows 10 isn't supposed to get security updates anymore, how can that be an issue?
Ron
1 Reply
Before reversing any update, establish whether editing fails in every workbook or only particular files. Try a new blank workbook and note the exact message or behavior. For an affected file, check whether it is read-only, in Protected View or on a protected worksheet; do not bypass protection on an untrusted file. Then compare Excel started with excel /safe to isolate add-ins and startup customizations. Your Windows-update assumption also needs clarification: end of ordinary Windows 10 support does not mean every component stops receiving every kind of update, and eligible ESU devices can still receive security updates. Office and Windows updates are separate products. Excel 2010 itself reached end of support in October 2020, so a current supported fix cannot be assumed. Preserve the files, collect the Windows edition and update identifiers, and plan migration to supported Office rather than making security-update removal the default solution.
