XA650W2K8R2X64001 error Unable to install

I have had problems installing the citrix patch XA650W2K8R264001 at a number of customer sites.

There are few documented solutions that seem to work.

1.) Deleting the out of date Citrix Certificate from Trusted publishers being one of them.
(powershell script to perform this thx Darren Long)
$store = New-Object system.security.cryptography.x509certificates.x509Store 'TrustedPublisher', 'LocalMachine'
$store.Open('ReadWrite')
$certs = @(dir cert:\LocalMachine\TrustedPublisher | ? {$_.Subject -like '*citrix*'})

foreach ($cert in $certs) {$store.Remove($cert)}
$store.close()



2.) Running this fix being another http://support.citrix.com/article/CTX131927
3.) Installing XA650W2K8R264014 before 001 being another.