Making pretty permalinks work in WAMP
All you need to do is turn on the mod_rewrite in the wamp settings tab.
Click Wamp -> Apache -> Apache Modules -> rewrite_module
If you select that then turn on %postname% it should work
Did you reboot Apache after editing httpd.conf?
A bulletproof check for mod_rewrite is to remove the <IfModule>...</IfModule> tags and try running WordPress - if you get a 500 Server Error, mod_rewrite isn't installed.
Also I would recommend changing <Directory /> to <Directory "C:/path/to/server/root"> (note the forward slashes too, even on Windows).
And the deny order should be switched if you're only on a development server;
Order allow,denyAllow from all
The problem may be:Whenever you have permalinks in subfolder of your main www folder (i.e.
RewriteBase /subdirectory/you may need to have a .htaccess file in your main c:\wamp\www folder too.