Processor Speed
CPU is often referred to as the "brains" of a computer. It carries instructions and oversees all main functions. The CPU speed, which is measured in MH, is one of the main factors that affect the performance of a computer.

System RAM
RAM is the temporary storage of a computer. RAM is mainly important when multiple applications are running. More RAM means faster performance.

Hard Disk Speed and Size
The size of the hard disk decides the amount of data that can be stored. As the space is filled up, the system slows down. The hard disk processing speed, or how quickly the drive can transfer and store information, directly affects the time it takes for the PC to boot up and load programs.

Graphic Card
The graphics card can increase the performance of a computer, especially if the system is frequently used to play games or watch videos. Graphics cards that are specifically designed to handle high-quality images can be bought at many electronics stores and separately installed.

Spyware and Viruses
Spyware programs make computers slower because they run silently in the background, using system resources. Malware and viruses can corrupt essential data and programs, causing the system to slow down or even crash.

Temporary Files
Temporary files can build up on the hard disk, taking up space and affecting performance. This can be avoided by regularly emptying the recycle bin or trash and clearing the Internet history, including cookies.