# 30-day free trial in GuardDuty-initiated malware scan
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You can choose to enable or disable GuardDuty-initiated malware scan for an AWS account in a supported AWS Region at any time. If you have an organization, each member account has its own 30-day free trial.

To understand how 30-day free trial works, consider the following scenarios:
+ When you enable GuardDuty for the first time (new GuardDuty account), GuardDuty-initiated malware scan also gets enabled and is included in the 30-day free trial associated with the GuardDuty service.
+ An existing GuardDuty account can enable GuardDuty-initiated malware scan for the first time with a 30-day free trial. When you enable this feature in a different Region for the first time, you will get a 30-day free trial in that Region.
+ If you have been using Malware Protection for EC2 in an AWS Region before this protection plan was divided into two scan types – GuardDuty-initiated malware scan and On-demand malware scan, you can continue using GuardDuty-initiated malware scan with the same pricing model in the same AWS Region. If you enable GuardDuty-initiated malware scan for the first time in a new Region, your account will get a 30-day free trial. 

**Note**  
Even if you're on a 30-day free trial period, the standard usage cost for creating the Amazon EBS volume snapshots and their retention applies. For more information, see [Amazon EBS pricing](https://aws.amazon.com/ebs/pricing/).