EC2 Instance type results in reachability failure

Hi There

Please take a look at this troubleshooting article that talks about issues when upgrading drivers or changing instance types.

Here is documentation about the compatibility of different instance types and AMI's.

Since the instance screenshot shows the Windows logon screen, it sounds like the network card is not coming up. You can try switching back to the R5 instance type and follow steps 1, 2, and 3 from this guide to update all of the required drivers, and then try switching instance types again.

Failure to check the status of an instance indicates that the instance may have the following problems

Network or startup configuration problems Exhausted memory File system problems Operating system startup failure Volumes not mounted properly Incompatible drivers Exhausted CPU https://aws.amazon.com/jp/premiumsupport/knowledge-center/ec2-windows-instance-status-check-fail/

Troubleshooting for EC2 Windows instances can be found below.

https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/troubleshooting-windows-instances.html