If you want to permanently delete a digital certificate in your certificate store, here is how. This line lists all your personal certificates:
PS> Get-ChildItem cert:\CurrentUser\My
To get rid of a certificate, use this code (Warning: deleting certificates that are needed can damage your computer, so be careful to select only certificates you really want to delete):
PS> Get-ChildItem cert:\CurrentUser\My | Where-Object { $_.Subject -like 'CN=*test*' } | ForEach-Object { $store = Get-Item $_.PSParentPath $store.Open('ReadWrite') $store.Remove($_) $store.Close() }