Why is my EC2 Windows instance down with an instance status check failure?

Last updated: 2019-08-28

My Amazon Elastic Compute Cloud (Amazon EC2) Windows instance went down suddenly and is no longer reachable. The instance status check failed. What happened, and how can I fix this? 

Short Description

Amazon Web Services (AWS) monitors the health of each EC2 instance with two status checks. An EC2 instance becomes unreachable if a status check fails.

An instance status check failure indicates a problem with the instance, such as:

  • Networking or startup configuration issues
  • Exhausted memory
  • File system issues
  • Failure to boot the operating system
  • Failure to mount volumes correctly
  • Incompatible drivers

If both the instance and system status checks fail, see Why is my EC2 Windows instance down with a system status check failure or status check 0/2?

Resolution

Because instance status checks are likely caused by issues within the guest operating system, focus your troubleshooting on reviewing the following:

  • Console output
  • System logs
  • Operating system or application error messages

For more information, see Troubleshooting Windows instances.

Tip: You can also use EC2Rescue for Windows Server to diagnose and troubleshoot issues.