Windows & BSOD · medium

How to fixSVC-FAIL-LanmanServer

System service down: Server

What this error means

SVC-FAIL-LanmanServer shows up as a medium-severity Windows operating system fault. The LanmanServer service terminated unexpectedly. Services dependent on this process may not work. This usually traces back to blocked by antivirus and missing permission. Follow the steps below to fix it.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Restart the service via services.msc

Restart the service via services.msc.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Fix service permissions

Fix service permissions.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Restore system files

Restore system files.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Corrupt service registry keys
  • Blocked by antivirus
  • Missing permission