RESOLVED - see last post. Objective: Install Photo Story 3 on 20 lab computers running Windows XP SP2. Photo Story 3 requires WMP 10 or higher. Computers were running WMP 11 but a conflict with our CD burning software caused me to revert back to WMP 9. Problem: When I attempt to install WMP 10 from the .msi file either via Group Policy or by executing the file once saved to the desktop, the following error message displays: "This version of Windows Media Technologies is incompatible with this version of Windows" According to this site, the wmploc.dll file is the problem: http://msmvps.com/blogs/chrisl/archive/2004/10/02/14743.aspx When I finally succeeded replacing the wmploc.dll on the machine with the one from the CD, WMP would not run at all. I fixed that (backed up the file in question) but I still can't install WMP10. Judging from the comments section, the fix works for some but not for others. It seems that Windows File Protection may have a role in this I did run sfc /scannow but that made no difference: http://www.microsoft.com/windows/windowsme...dvice/0073.mspx Question: I was going to ask - "What do I do?" when I came across this solution from: http://www.jsifaq.com/SF/Tips/Tip.aspx?id=10355 1. Open a CMD.EXE window. 2. Type the following commands, pressing Enter after each line: CD /D %SystemDrive%for /f "Tokens=*" %x in ('dir /b /a /s Wmploc.dll') do copy "%x" %SystemRoot%\System32\*.* 3. Install Windows Media Player 10. Isn't the command above all one line? If not, where are the breaks (when should I press enter)? Thank you, David