Outlook Not Working After 2026 Update (KB5074109)?

January 2026 Windows update KB5074109 caused widespread Outlook issues — hangs/"Not Responding", missing Sent Items, emails redownloading, POP/PST freezes (especially OneDrive). AMRescue provides remote repair worldwide: fix corrupted files, recover data, and safely revert New Outlook to Classic with zero data loss.

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Outlook repair after KB5074109 2026 update – fix hangs and revert to classic remotely

Common Outlook Problems After January 2026 Update (KB5074109)

  • Outlook hangs and shows “Not Responding”
  • Cannot reopen without ending process in Task Manager
  • Sent emails missing from Sent Items
  • Emails redownloading repeatedly
  • POP accounts freeze with PST on cloud storage
  • Add-ins not working after update
  • Slow performance or freezing
  • KB5078127 fix did not fully resolve corruption

How AMRescue Repairs Outlook After 2026 Updates

Even after Microsoft's KB5078127 update, corrupted PST/OST files can persist. We remotely diagnose KB5074109-related issues, repair files, and restore full functionality.

Remote Diagnosis

Analyze profile, PST/OST corruption, and KB5074109 effects remotely.

Repair & Recovery

Fix corrupted files, recover missing emails, contacts & calendars.

Classic Reversion

Safely revert to Classic Outlook, preserving add-ins and offline access.

Revert to Classic Outlook After 2026 Updates

New Outlook limits important features like full PST/OST support and add-in compatibility. Many users need Classic for reliable daily work.

We ensure safe reversion remotely — no registry risks, all data and settings preserved.

  • No data loss during reversion
  • Full PST/OST access restored
  • All add-ins and features recovered
  • Optimized for business workflows
  • Remote service worldwide

Data We Recover & Repair After Updates

Emails & Folders
Contacts
Calendars
Attachments
Tasks & Notes
Shared Mailboxes
Archive Mailboxes
OST / PST Files

Our Remote Repair Process

1
Contact Us

Submit your issue details securely for remote assistance.

2
Diagnosis

Remote analysis of KB5074109 effects and file corruption.

3
Repair

Fix hangs, recover data, revert to Classic safely.

4
Resolution

Outlook fully functional again – all data preserved.

What Clients Say About Our Outlook Repair

Results from users fixed after 2026 update issues – remote service worldwide.

"Outlook frozen after January update – Sent Items vanished. Fixed remotely in hours, no data lost. Excellent service!"

Sarah M.

New York, USA

"KB5074109 broke my POP setup – constant hangs. Reverted to Classic perfectly, all emails recovered remotely."

James L.

Toronto, Canada

"Tried the Microsoft patch but PST remained corrupted. Remote repair restored everything – calendars, contacts, all back."

Emma R.

Sydney, Australia

Get Your Outlook Fixed Remotely Now

Secure & Confidential • Response instantly • Outlook Experts