1. Too many programs running at the same time
3. An outdated operating system
4. Outdated or corrupt drivers
5. Not enough memory (RAM)
6. Insufficient hard drive space
7. Hardware issues, such as a faulty or overloaded power supply or a bad processor
8. Fragmented hard drive or excessive disk usage
9. Poorly written software or too many programs running in the background
10. Corrupt/fragmented system files or invalid registry entries