Problem

While trying to install Office Web Applications on SharePoint 2010 which has been installed on Windows 7 you received an error message that states:

-A system restart from a previous installation or update is pending. Restart your computer and run setup to complete.

-Windows Server Features or Role Services required by this product are not enabled.

Cause

If you check the "Wac Server Setup (*).log" files located in the %TEMP% folder you will notice an error which has a hard coded path to an .exe which does not exist.

Under Windows7 you will not find ServerManagerCmd.exe in the System32 folder.

Workaround

1. Copy the ServerManagerCmd.exe file into the Windows\System32 folder.
2. If the setup program still complains about requiring a Reboot, then do it.
3. Run Setup.exe for Office web apps again. This time you should be presented with the license key screen.