Just tried to install Google Chrome on Server 2008 and received the following error from Google Chrome Installer:
Installation failed. Component ChromeGears failed to install. Detailed message: The installer encountered error 1625: The installation is forbidden by system policy. Contact your system administrator.
Solved: Ran the ChromeSetup.exe file as administrator and everything installed okay. Open the containing folder of the setup file and right click install file (ChromeSetup.exe) and select "Run as Administrator."