How to delete symantec Anti Virus

i got these symantec installed , it checks viruses in backround , one thing it slows down whole of my prorams and then wanted to uninstall , but that uninstall thing is not there so did deliting the whole installed symantec it went ok but some remained and couldnt be deleted ..///// it shows like this \\\\Cannot delete Clipproxy.dll.Access is denied ///Make sure the disk is not full or write protected and that the file is not currently in use.

Then the error after not fulll completion deletiion , it keeps comming up theise symantec installing thing so any body wiht the idea of getting rid it of completely

I dont know hot keys