Common Problems With a PC

PCs are the most common type of computer in the world. PCs can run a number of different operating systems, ranging from Microsoft Windows to Unix and Linux. Regardless of the operating system running on the computer, a number of common problems can occur with PC hardware. Understanding those problems can help with troubleshooting and repair.

Memory Problems
The most common problem experienced by PCs is inadequate random access memory (RAM). If your computer doesn't have enough RAM, it forces the hard disk to act as short-term storage for program execution. Because the hard disk is slower than RAM, it causes your overall computing experience to be slow and sluggish.

CPU Problems
Older CPUs may not be able to perform calculations fast enough for more modern operating systems and software. CPU power grows quickly, and after a number of years, newer software may simply outstrip an older CPU's ability to perform calculations to run the program. A good example of this is modern multiple-core CPUs. Multiple-core CPUs actually contain two or more CPUs in one package. CPUs that are a generation or two old only have a single core, or single CPU.

Hard Disk Failure
Hard disks are complex mechanical systems where components operate with very little margin for error. As a hard disk ages, components can wear out, causing mechanical failure. Some older computers cannot address the full range of newer high-capacity hard drives. As a result, some newer high-capacity hard drives may not work in older computers.

CD/DVD Drive Issues
CD and DVD drives use lasers to read data from the reflective portion of a CD or DVD. Over time, CD and DVD drive lasers can become misaligned. Because CD and DVD drives are mechanical, parts of the drive can fail over time. This is usually indicated by clicking or grinding noises when the computer tries to access the drive.

Power Supply Problems
The power supply in your PC is responsible for providing stable power to your computer's components. A power supply that is too small can cause problems with overheating, reboots and computer lockups. As a power supply ages, the voltages it provides to system components may begin to vary, causing similar symptoms to a power supply that is too small. A power supply that is failing or is too small can also cause problems, including failure, in other computer components.

Additional Reading:
https://docs.google.com/document/d/1HwMGH_6k_9oVo1-39kD-hfmidl_od4b0FdvKvz6_8z8/edit

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