Excessive storage of temporary files, dump storage etc- Clean your PC regularly or at least once in week for these unnecessary and unwanted items/files they are always store inside the PC and can cause slower down of a PC.
mimi naomba maoni yenu wananchi mwalimu anawatoa wanafunzi nje kufanya mtihani wakati nje kunajua kali na bila shaka mwanafunzi akilalamika mwalimiu hapa jua atapata viboko asivyo vitegemea hii haifahi