Computers can fail to power on for a variety of reasons: a failed power supply, a short on the mother board (or the computer thinking there's a short when there isn't), a bad power cable, or something as simple as your cat accidentally flipping the...
Computers can run slowly for many reasons! You may be trying to run too many tasks for your computer to handle, your hard drive may be damaged or failing, your computer could be over heating, or your it could be infected with malware. Check your internet...
Even when running a good antivirus, antispyware, and firewall, you can become infected. Many times this happens because a website tricked you into thinking it had a file or update you needed, when in reality, you downloaded a bad file that you gave a bad...