For some reason I don't the go back to previous windows update option so that's the only reason I didn't try that. When Outlook gets stuck on "Synchronizing Folders", it’s usually a sync or file corruption issue — not a permanent failure. By following these methods step-by-step, you can restore full email synchronization without reinstalling Outlook. FixTechGuide continues to help users resolve Outlook and Office 365 errors quickly and safely.

• Suddenly none of the files have thumbnails but a blank icon, most of the folders get stuck in "working on it" and the only thing that seems to fix it is restarting the pc.
• Follow these steps in order—from quick fixes to deeper technical repairs.
• For some reason I don't the go back to previous windows update option so that's the only reason I didn't try that.
• Faulty add-ins (especially antivirus or CRM extensions) can freeze Outlook during synchronization.
• The thing is that the file explorer stops working completely after like 1 or 2 minutes the pc is on.
• If the test message sends successfully but folders don’t sync, move to the next step.

Preventive Measures for Smooth Outlook Performance

This issue usually happens when Outlook cannot properly connect or sync with your mail server. In this FixTechGuide tutorial, we’ll explore the causes and give you clear, step-by-step solutions to fix it fast. The thing is that the file explorer stops working completely after like 1 or 2 minutes the pc is on. Suddenly none of the files have thumbnails but a blank icon, most of Outlook Stuck on Synchronizing Folders the folders get stuck in "working on it" and the only thing that seems to fix it is restarting the pc.

File explorer "working on it" stuck, file thumbnails not loading

I have tried deleting the file explorer caché, ending the task, windows recovery, cmd sfc/ scannow, disabling the quick access options, updating to W11. Nothing works or fixes the issue for a while until it goes back again to the same. My fans are also going crazy every time that happens, but the performance seems just fine in the task manager.

Stay Updated

Upgrade to Microsoft Edge to take advantage of the latest features, security updates, Outlook Login Issues Troubleshooting and technical support. Outlook lets you manually control which folders sync with the server. If the test message sends successfully but folders don’t sync, move to the next step. This mode is ideal for slow connections or intermittent server responses. If Outlook syncs fine now, re-enable add-ins one by one to find the culprit. Faulty add-ins (especially antivirus or CRM extensions) can freeze Outlook during synchronization.

Repair Outlook OST File Not Working in Office 365 – Complete Fix (

But then again, after it restarts, everything works fine and then after like 2 minutes dies again. Before you dive into folder sync issues, read our complete Outlook and Office 365 Sync Guide for an overview of how synchronization works. By limiting synchronization to active folders, Outlook finishes updates faster and avoids timeouts. Follow these steps in order—from quick fixes to deeper technical repairs. Each one directly targets the cause of Outlook sync failure. Re-adding FixTechGuide email error solutions the account forces Outlook to rebuild all folders and clear old stuck subscriptions.