Windows 7: my themes problem in Personalization

Hi everybody,

I think if we use troubleshooting tools for unnecessary times it will be BAD for our system. i two times changed my windows for this problem. i do not know does troubleshooting do that with my windows settings or does windows update do it? I have installed all updates for windows 7 ultimate (64-bit) and before i use troubleshooting tonight, the personalization > my themes worked correctly but now it does not work correctly. i can change my theme and i can delete them but there is a custom theme that show the corrent theme and i can not delete it. i select delete for that theme but it does not work. i got a screenshot please see.

Thank you,
Alireza

See step 5 here:

Theme - Change or Save

Thanks but i know how to delete current theme i have another problem ! please read again my first post

Are you talking about that unsaved theme?
Try selecting one of your aero themes, then deleting that unsaved one.
If that's not what you want could you explain more please.

Yes, i am talking about that unsaved theme. i did not select it for my current theme. if i select any themes that will be set on unsaved theme! and when i want to delete it, it will get a copy of itself and send it to recycle bin but that original unsaved theme is exists.

~ I restore a point to before using the troubleshooting, the problem is fixed now but i want to know why when i use troubleshooting to fix exist problems, it break my windows?