Citrix XenApp 6.5 Installation Error: 1603

I am installing Citrix XenApp 6.5 on Windows Server 2008 R2 SP1 x64.

During installation I recieve an error stating that XenApp Server failed. Checking the log, the only real error reference is 1603 but appears to be a generic fail.

As far as I am aware, all prerequisites are installed and other components, such as the licence server, have installed and can be configured.

I have attached the log for anyone who has the time to look through it.

Any ideas on what may be the cause and, ultimately, the soluiton?

Thanks in advance.
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As per logs i see some visual c++ errors: Try this solution as defined for xenapp6:

If still doesn't work, download the image once again in ISO format, burn it and try instead of extracting the contents. I had similar problems with Xenapp 6, got same 1603, after many tries i learnt it was due a missing file
Tony JLead Technical ArchitectCommented:
Some postings suggest that it could be a damaged ISO download.

Or the following may work:

Install \Support\vc¿redist\vc80_¿vcredist_x64¿ manually
Install as a local administrator, and by right-clicking and "Run as administrator"

Tony JLead Technical ArchitectCommented:
The problem with the article you pointed at, basraj, is that it applies to XA6 not 6.5 and it references RPM.MSI not MPS.MSI.

It may, of course, still have relevance.
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Tony...does this server have a newly installed OS or are applications already present?

If it is a clean server I recommend you start by downloading the installer again.

Tony JLead Technical ArchitectCommented:
Jacob - not my question, mate :)

But I did alreayd point out that it might be a damaged ISO that was downloaded - it seems fairly common in the Citrix forums, worryingly.
ultra-itAuthor Commented:
Finally resolved, checked the ISO and seemed OK, MD5 checked out.

Believe it may now have been a GPO that disables the local administrator (and a couple of reg keys) in effect on our domain (we've had a Conficker infestation of late). Disabled this GPO and retried and everything was just fine.

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ultra-itAuthor Commented:
GPO in effect disabled local administrator account and some registry keys to prevent Conficker from spreading. After disabling this GPO, Citrix installed correctly.
Which keys ? do you suggest that the installation must be done with the local admin account and not with the domain admin account ?
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