Notice: Undefined index: REQUEST_URI in F:\Domains\mydomain.com\wwwroot\wp-settings.php on line 81

To solve this issue you need to edit the wp-settings.php file.  After line 79 or “// Append the query string if it exists and isn’t null” add the following line:
  $_SERVER['REQUEST_URI'] = substr($_SERVER['PHP_SELF'],0);

This error is due to IIS not recognizing ‘REQUEST_URI’

If you don’t want to make the modification yourself you can download the modified wp-setting.php file from here.

Notice: Undefined index: PATH_INFO in C:\WebSites\user\webroot\blog\wp-settings.php on line 72

Notice: Undefined index: PATH_INFO in C:\WebSites\user\webroot\blog\wp-settings.php on line 75

To solve this issue you need to edit the wp-settings.php file.  Open the file in your favorite editor and after line 71 or “// Some IIS + PHP configurations puts the script-name in the path-info (No need to append it twice)” insert the following:
if ( isset($_SERVER['PATH_INFO']) ) {

add the closing “}”  just above the original line 77 or “// Append the query string if it exists and isn’t null”

With those changes the problem is solved. I assume this problem will be fixed in the next release of WordPress.