How do I migrate from t2.micro to t3.micro

let's start with the following articles

https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/enhanced-networking-ena.html

as a summary

1. (optional) ENA drivers are included in Windows Server 2012 R2 by default but if you are using an old AMI version etc. please download and install ENA driver manually.
2. Note: do not forget to backup :)
3. Enable ENA Support

aws ec2 modify-instance-attribute --instance-id i-1234567890abcdef0 --ena-support

4. then update the instance type
5. verify the new ENA adapter and driver from the Device Manager

Take the following steps in AWS Console:

1. Select the instance
2. Choose Instance state, Stop instance
3. With the instance still selected, choose Actions, Instance settings, Change instance type

Recommending backing up all data before attempting.

Here is a video that walks through migrating a Windows server instance: https://www.youtube.com/watch?v=Df89U7Xi24A

The network interfaces are different between t2 and t3 and will not have network connectivity after you change the type.

Please see the Compatibility https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/resize-limitations.html

I have yet to change a windows from T2 to T3 but I also need too at some point