The computer is a device without which life has become unimaginable. You need the computer for everything, from communicating with your friends to reading the latest news. Life has become much smoother after computers and internet have become popular. But computers too have their own set problems like humans have health problems.
The first problem faced by a computer is crashing. This is also called a computer hang, freeze or in simple words the computer gets stuck. This usually occurs due to some error in the code or instructions being given to the operating system, which is the core of the device. The system is said to have crashed when nothing moves no matter how many times you click the mouse or press any other key.
Another problem is the attack of security. This is a whole new world with a lot of new creatures like worms, viruses, Trojan horse and similar such threats. All these enter the network of the computer due to a poor security system in it. A good security system can detect an unwanted entity as soon as it enters the network, and it raises the alarm so that precautions can be taken.
The main source of all the network threats is, of course, the internet. You may never know the problems lurking in the sites waiting to get into your network. Hence it becomes necessary to install a good anti-virus system on the computer. Another source is the external memory devices like pen drives, etc which can transfer threats from one system to another.
So you can see that the computer, though very clever and helpful in your estimation, can be threatened by many problems. Cleaning the disks from temporary files or unwanted files can help in many ways. Having good software for security is another solution.