Many people face computer problems every day, which are actually very easy to fix, the main thing is to learn how to identify these errors. This article will show only the most common mistakes.
Steps

Step 1. Check POST signals
POST stands for Post-Enable Self Test. Typically, POST messages appear immediately after turning on the computer, even before the operating system boots. POST displays any errors related to the hardware of the computer, regardless of whether they affect the loading of the operating system or not.

Step 2. Pay attention to the boot time of the operating system
Long boot times indicate hard disk errors.

Step 3. After booting the system, pay attention to the graphics
If the display quality deteriorates, there are problems with the video card driver or the video card itself.

Step 4. Perform a sound test
Sound problems are not the most critical errors, but this test shows how correctly the computer is configured. Play any audio file. If the sound "floats" or disappears, then this indicates a processor load and a lack of RAM. The best test is to change the operating system boot sound. Another cause of interrupted audio can be PIO (programmed I / O). It affects the speed of reading information from the hard disk. The problem is solved by switching to DMA mode, in which reading and writing information is much faster.

Step 5. Check the recently installed hardware
On many operating systems, especially Windows, new drivers can cause hardware conflicts. Windows usually warns when installing conflicting devices. To check this, go to Device Manager. This can be done through the control panel. Select System> Hardware> Device Manager. View the status of the equipment and, if necessary, make changes to the equipment settings.

Step 6. Check recently installed programs
Some programs require a powerful computer to work comfortably. If problems start after starting a program, then the problem is in it. If the problems start right after the system boots, then the program may be launched along with the operating system.

Step 7. Check RAM usage and CPU utilization
See which program "eats up" your computer's resources. To do this, start the "Task Manager". Right-click on the Taskbar and select Task Manager> Processes. The processor utilization is displayed as a percentage. The Memory section displays how much memory each running process is consuming.

Step 8. Listen to the work of the computer
If you hear extraneous sounds during the operation of the hard disk: beeping, rattling, clicks - turn off the computer and diagnose the disk. Sounds can also come from a fan cooling the processor. Under increased load, the processor heats up and the fan has to run at higher speeds to ensure adequate cooling.

Step 9. Check your computer for viruses and other malware
Malicious programs reduce the performance of your computer. Perform a full scan of your computer with an antivirus (for example, Norton, Avast!) With the latest updates. Also run a scan with a malware scanner (such as Spybot Search & Destroy).

Step 10. Check in Safe Mode
Boot into Safe Mode by pressing the F8 key during POST before the operating system boots. If the problem manifests itself in safe mode, then the problem is in the operating system. It makes sense to reinstall it.
Advice
- These tips will only help you identify common problems. More complex problems may require a specialist.
- If you are not sure that you can diagnose and fix the computer yourself, then it is better to take it to a service center, where they will put it in order for a reasonable fee.
Warnings
- Do not attempt to repair your computer if you are unsure of what you are doing. You can only make the problem worse or create a new one.
- Before taking any action, consult a specialist.