Computer Virus

It's been three days ago when I found out there are so many critical conditions in my computer needed to be fix. When I scan the computer is says I need to resolves 256 items if not the computer will crash.

It's so annoying when I am doing something the pages will just blink and my things will disappear. My husband says that's it time to buy another computer.

Since were not so rich I disagree with him. I am hoping that this problem will be resolve soon if you can help me how to resolve this problem then I would be happy LOL:)