When i start my computer or whenever i log in this virius always pop ups. Its called the win32.ncasespy [trj]. It like when i try to repair it or move it to the the chest and delete it it comes back. Im so confused ???
Looks to me that you are infected with the nCase parasite.
For more information on this parachute and removal, visit here:
http://www.doxdesk.com/parasite/nCase.html
A lot of ad/spywares tends to reinstall themselves when they detected that some part of their ad/spyware is deleted. This might been what happen when avast! deletes the file.
Good Luck! 
Click on the link in my signature and follow the instructions on that page.
ThankX alot its byebye and neeeeeeeeeevvvvvvveeeeeeeerrrrrrrr coming back ;D ;D ;D
Good to hear. Don’t forget to keep your system up-to-date with the Microsoft Windows Updates