The error "Members can't remove themselves from security groups. Please set the group to Closed for requests to leave." when editing a distribution group.

Check for hotfix on multiple computers

Create file c:\server_list.txt with a list of the servers to check.
In powershell scripts below: Replace $Patch variable KB2982791with the hotfix your looking for.

2 Files will be created on your desktop.
      Hotfix=Present.log
      Missing=Hotfix.log


Run the following from powershell
$computers = cat C:\server_list.txt
$Patch = "KB2982791"
foreach ($computer in $computers)  
{  
if (get-hotfix -id $Patch -ComputerName $computer -ErrorAction 0)  
{  
Add-content "Hotfix is Present in $computer" -path "$env:USERPROFILE\Desktop\Hotfix-Present.log" 
}
Else  
{  
Add-content "Hotfix is not Present in $computer" -path "$env:USERPROFILE\Desktop\Missing-Hotfix.log"   
} 
}