Clean Up Computer

I have a Gateway laptop like about two years old and Fios as my internet provider I have added a Registry Cleaner Malware Cleaner and a Different Ant virus Software how ever the machine is still very slow very slow and the net takes a long time to boot to a wndow I do run yahoo and Aim at the same time always have but as i type this i am concerned i am gonna get the error message that the Net has stopped working I am a Mechanic and Custom Fabricatior by trade hopefully someone is willing to exchange some info and help I have Windows Vista aswell I know its a head ache in it self but i have fgured it out i have always had issues with this machine Just never this slow …… Sincerly
Pat