Hi @Saiyad Rahim ,
your alert parameters are not chose properly. For example, the computername shold be found, suing:
$Target/Host/Property[Type="Windows!Microsoft.Windows.Computer"]/NetworkName$
This can be checked also here:
Logical CPU Percentage Utilization
https://systemcenter.wiki/?GetElement=Microsoft.Windows.Server.10.0.LogicalProcessor.CPUUtilization&Type=UnitMonitor&ManagementPack=Microsoft.Windows.Server.2016.Monitoring&Version=10.1.0.6
Just check this article from Kevin:
Adding custom information to alert descriptions and notifications
https://kevinholman.com/2007/12/12/adding-custom-information-to-alert-descriptions-and-notifications/
or comapre the alert parameters to another Perofrmance monitor and use the same params.
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(If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)
Regards
Stoyan Chalakov