UAC could be causing both the errors, right click on the msi files and select Run as Administrator.Regards, Santosh I do not represent the organisation I work for, all the opinions expressed here are my own. This posting is provided "AS IS" with no warranties or guarantees and confers no rights. Whenever you see a helpful reply, click on Vote As Helpful & click on Mark As Answer if a post answers your question.

I have tried running as a different user as well as Run as Administrator, it does not help unfortunately. UAC is not enabled.

Hi all I am trying to install two supporting services for a web application we are using within our network. When trying to run the two installers they are failing with two separate errors namely 'Error 1001. Access is denied' & 'The installer has encountered an unexpected error installing this package. This may indicate a problem with this package. The error code is 2869.' I have not yet done a restart on the server but will try to do so tonight to clear any MSI related install issues, I have enabled MSI logging but it does not really point at what the issue may be. Any assistance would be appreciated. OS: Windows Server 2008 SP1

UAC could be causing both the errors, right click on the msi files and select Run as Administrator.Regards, Santosh I do not represent the organisation I work for, all the opinions expressed here are my own. This posting is provided "AS IS" with no warranties or guarantees and confers no rights. Whenever you see a helpful reply, click on Vote As Helpful & click on Mark As Answer if a post answers your question.

FYI the issue ending up being a HIPS policy in ESET Anti-Virus blocking write access the registry, once this was removed I was able to install the two installation packages.