SP1 and XPS Viewer Essentials Pack

[jrf2027]

Just a FYI for those of you that use XPS Viewer Essentials Pack on Vista...

I reinstalled Vista last night, with SP1 integrated using vLite. After reinstallation, I tried to reinstall the XPS Viewer Essentials Pack (Microsoft link) and received a "This update is not needed" message. However, the viewer was not installed on the system.

I had originally downloaded the 32-bit .msu installation file last fall - the file size was 1,964 KB. So I re-downloaded the .msu installation file from Microsoft, and noticed that the file was larger - the current version of the file available for download weighed in at 1,966 KB. The newly downloaded file installed perfectly.

I'd guess that Microsoft may have originally planned on putting this package in SP1, and created a flag in the installer preventing it from installing on any system with a service pack installed. Then it was cut from SP1 and MS had to reissue the update for SP1 compatibility.

So, if you use this software, you will need to re-download it for use in future deployments to machines with SP1 already installed.