After changing Windows 7 Theme everything looks gray and has a border.

For some reason after I changed my Windows 7 theme, firefox started to look like this, in every site, I tried re-installing, restarting and even system restore but it still doesn't fix it, I remember this happening before and I had to press CTRL+ Something, I forgot.

Here's what it looks like: https://i.imgur.com/ggrp0.png

I tried using another account and it looks fine, nothing seems broken.

Also this is just another small problem but might as well give it a shot if anyone knows a solution: Well I set my downloads on "Ask me where to save my files" and then after I download something I always put it in it's right folder, But recently for some reason when I click Save File and Ok the Save As... window doesn't show up, I waited for a bit and I still get nothing, I even tried it on Google Chrome and another account but it still wouldn't show up, Though making it download to the default "Download" Folder works, But it still bugs me. If anyone has a solution for this, I truly appreciate it.

Thank you for the welcome. Thank you very much for helping me fix the theme problem but I still got the irritating download problem. I checked the box that you wanted me to check but it still ends up not showing up at all, In any browser might I add.

I check the box on options like so:


Then I try to download a file and it ends up like this:

Well I have tried both of those solutions, It helped fix a few errors but not the ones that really need fixing. I still have the Save As... Windows not showing up problem. I've got a few pictures that might help. My Firefox version is 10.0
If you need more info such as the logs and my add-ons, just ask.

The download window looks like this, But it feels like it looks somehow different.


My bookmarks all have this weird white outline/border which it didn't have before.


And one last thing is that all my scrolling bar looks like this, in ANY program and any browser.