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The physical memory of a Windows instance is abnormal

Last Updated: Dec 30, 2020

Problem description

Upgrade the physical memory of the Windows-based ECS instance to 16GB, but only 2GB of available memory is displayed.


The Windows system is not activated.


Alibaba Cloud reminds you that:

  • Before you perform operations that may cause risks, such as modifying instance configurations or data, we recommend that you check the disaster recovery and fault tolerance capabilities of the instances to ensure data security.
  • You can modify the configurations and data of instances including but not limited to Elastic Compute Service (ECS) and Relational Database Service (RDS) instances. Before the modification, we recommend that you create snapshots or enable RDS log backup.
  • If you have authorized or submitted sensitive information such as the logon account and password in the Alibaba Cloud Management Console, we recommend that you modify such information in a timely manner.

Activate the Windows operating system and restart the server. For more information, see how to use KMS domain names to activate Windows instances in VPCs.

Application scope

  • Elastic Compute Service