Something wrong with my computer?

I don’t know the cause, but my laptop won’t open any programs, actually anything… if i’m lucky it may open, 30% chance. and right now the internet somehow opened up for me. some other things going on is my connection. it’s perfectly connected, though it has that alert icon indicating it’s not connected, but im still getting good connection! also, and if i am able too open something it doesn’t load all the way it’ll just say “not responding”. when i try downloading, it also freezes up, saying “not responding” and i am unable to exit it anything. my task manager has gone wrong, it says “failure too open security options” something like that. iv’e tryed system restore and when im done with it, a black screen simply pops up and stays like that for hours. please help? anything i can do too fix these problems??