- click start and run
- type esentutl /p %windir%\security\database\secedit.sdb and press enter
- after pressing enter it will open warning message and allowing you two options, ok or cancel
- dont worry , click ok
- when finish, try to install windows fax again, the installation will continue with no problems.
additional - for the above problem, re-registering the cfgmgr32.dll file could also solve the problem, to learn how to register dll file please see this post.