http://blogs.technet.com/b/mspfe/archive/2011/12/06/what_2D00_to_2D00_do_2D00_when_2D00_system_2D00_center_2D00_2012_2D00_endpoint_2D00_protection_2D00_rc_2D00_installation_2D00_fails.aspxWritten by Frank Pawetzki, Microsoft Premier Field Engineer The Issue: This happened to me today on my Windows 7 machine: the installation of Microsoft System Center 2012 Endpoint Protection ( Release Candidate ) failed with error code 0x80070643 . Theen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/mspfe/archive/2011/12/06/what_2D00_to_2D00_do_2D00_when_2D00_system_2D00_center_2D00_2012_2D00_endpoint_2D00_protection_2D00_rc_2D00_installation_2D00_fails.aspx#3540889Fri, 14 Dec 2012 15:09:23 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3540889Johan Wistrom<p>Hello,</p> <p>Which yellow marked key exactly?</p> <div style="clear:both;"></div><img src="http://blogs.technet.com/aggbug.aspx?PostID=3540889" width="1" height="1">