tried to install umbraco from the platform installer.

As a developer I already have SQL server installed on my local machine.

It has mixed auth with everything up until Umbraco using Windows authentication.

1: Why does Umbraco through the platform installer not allow Windows Auth for SQL ?

The installer needed a user 'umbracouser' and as this is a local install in a secure environment I set the password to be 'umbracouser' (so I will not forget it in a months time), installation fails with 

'Password validation failed. The password does not meet Windows policy requirements because it is not complex enough. '

but does not tell me that is a problem with the 'umbracouser' I have to guess.

2: Is this not a common enough problem that the error message should define which user has caused the issue ? (other users are used during the install process)

But that was only half the battle as you can not go 'back' and update the password you must go through again and resintall.

So I go through the installer again and give a truely secure password but it still fails.

In the end I have to delete the database and the umbraco folder before the installer will accept the settings.

3: Why does a failed install not roll back to the pre-installed state or to a state that allows reinstallation ?

(The installer certainly thinks there is no umbraco installed)

then finally I get to the setup pages and find that at penultimate stage I can not skip selecting a skin.

4: Why is there no 'I do not want to install a skin' option

after being forced to install a skin to get to the 'Your done' stage I click on the view my web site button and get

"Error reading XSLT file: \xslt\umbTopNavigation.xslt"

It would seem this is a common enough error that it could be fixed in the installer.

the other thing that vexed me during the isntallation was the (requirement ?) to give the cms a name so I can not access my site at
http://umbraco.local
but instead have to use
http://umbraco.local/umbraco