1, NEVER use a task killer.. Android doesn't need one..sometimes it causes issues..such as..well, yours.
But, no, i'm afraid the only options i can offer would require a factory reset. I assume you ain't rooted because 1, You didn't mention it. 2, It's a pain to do on the Wildfire.
You could see if you have a factory reset option from the bootloader menu.
Hold Volume down while turning the phone on. if you get to said menu, use volume up and down to navigate and power button to select.
like i said, there should be a factory reset option. I know nobody likes doing that, but it's all i have.