My Norton Security willnot run

I have tried so many things to get my Norton security to run. My laptop constantly freezes I have used power eraser and system restore and at one time I was told the BFE had been removed so I restored it. I don't know what else I can do but I have finals coming up and several papers due... I need my laptop working ASAP. Today I tried to do a quick scan and I keep getting an unspecified error message. But no scans and actually it says that Norton is no protecting my comp as I type this.