Actually, I did just find a post regarding Windows and Vista from Tim Grey. Not sure how it applies, but here it is. Christine
I just bought a new laptop (with VISTA) and tried to install my Photoshop CS2 - but couldn't. After 2 calls and 45 minutes on the phone with Adobe, I was told that Photoshop does not yet work on VISTA. I can't believe it. I had no problem loading Lightroom. Please advise.
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Not true at all. Photoshop CS2 does indeed work great with Windows Vista (the public beta of Photoshop CS3 does as well), and I've been using it for months on Windows Vista, quite happily. If you have setup multiple users on your laptop, make sure first that you are signed in as an administrator (in most cases you only have one user setup, and that user is an administrator, so this probably isn't the case). The next thing I would do is disable software that is running at startup, because something there may be interfering with the installation. To do so, go to the Start menu and in the Search box right above the Start button type MSCONFIG and press Enter. Click Continue if prompted and in the System Configuration dialog box that appears go to the Startup tab and click the Disable All button and click OK. Restart the computer and try the installation again. When you do get Photoshop installed properly, go back to the System Configuration dialog box and click Enable All in the Startup tab and click OK.
If this still doesn't resolve the issue, I would contact technical support for the manufacturer of your computer and let them know you're having this problem. They may be able to identify what specific to this configuration is causing a problem with the install.
You might also attempt contacting Adobe support to see if you can have the issue escalated to a higher-level support engineer. Because Photoshop CS2 is not officially supported by Adobe for Windows Vista (they haven't done the testing to be able to officially support it), they may not be willing to do this. However, they have published a document that indicates Photoshop CS2 does install and run under Windows Vista, so they might be willing to help in order to learn more about the issue you're having (helping you solve it in the process). You can read the document about Vista compatibility in Adobe products here:
http://www.adobe.com/support/products/pdfs/adobe_products_and_windows_vista.pdf