Im trying to connect to my Wordpress site (self hosted) through the Windows 8 app. First, after giving the Wordpress.com account details, it show my site and ask me to Authorize. after authorizing, it say "Can't connect to the service". I have used several security plugins in wordpress like the Better WP Security. But they block the old method of connecting. I think Jetpack have added a new way. Is there anything wrong with my PC?
I took a look at the WordPress app for Windows 8. It looks as though it is strictly built for WordPress.com, not self-hosted blogs.
The apps available for Android, iOS, and Windows Phone on the other hand actually support both self-hosted installations and WordPress.com.
Even though you integrated some WordPress.com services into your blog via JetPack, it unfortunately doesn't magically make it compatible.
Until the folks at Automattic update the Windows 8 app, I would suggest using either Word 2013 or Windows Live Writer if you are looking for a native blogging experience. Both of these programs support publishing to self-hosted WordPress installations out of the box.
It's only for .com installations. Here's a quote from their store page: