Try an alternative input device like a large track ball or a touch pad. If at all possible, visit a local computer store where you can try out a variety of devices before you buy. Today, portable computers are just about as powerful as desktop computers. Their smaller size makes them ideal for working in small spaces. But that same small size results in a smaller keyboard, screen, and input device.
Laptops also cost more than desktops and are more difficult and costly to upgrade.
I usually advise purchasing a laptop only if you will be using it while on the road. My computer caught one of the new viruses. At this site, you will also find instructions for eradicating the virus at this site. If your computer system files have been damaged and your computer is not working properly, you may need a professional to help reformat your hard disk. Don't forget that if your computer has contracted a virus, your information has been compromised.