When i expand something from task bar then bring mouse up in screen the file goes back to taskbar. how to fix

Answer 1

"When i expand something from task bar" - please re-post and explain:

What you mean by "expand" (as in Move an Icon or Open a program) and what the "something" is, with program name. Or, is it a file folder? How long have you had this strange behaviour? XP or Vista??? The more detail, the better.

Then, maybe we can help.