I was playing with a security plugin for WordPress and everything came up fine except for a warning that .htaccess was missing from the wp-admin folder. Fine, its not there, but what the heck do you put in it.
I did a search for this error and found lots of people asking the same question. I did find one solution and thought I would share it.
Basically create a .htaccess file with these parameters:
# BEGIN WordPress
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
# END WordPress
Save and it upload it into the wp-admin folder. You should be good as far as clearing that error up.