我的電腦成日自己跳制

圖片參考：http://hk.yimg.com/i/icon/16/7.gif
The computer always fail!
Over 90% chance is the AC's failure, in this case, you need to replace with a new AC or its fans.
On AC
Your AC voltage is not enough? Or it is unable to work? You need to replace it, if the voltage is incorrect, it will snap and damage the other hardwares.
On AC's fan
Every AC has 2 fans, one is in the main unit, another is on the back of the unit. You can open the unit's cover and check the inside's one, than check the behind one. A normal AC fan is 5130 to 5140 RPM, it you noted that one of them or both of them is below 5130 RPM, that the fan(s) has(have) problems, in this case, you can replace the fan(s), not the whole AC.
Why the fan'(s') failure may case shut down?
On AC's working, it need to change 220V into lower voltage, in this processing, it will heat, so the fans need to let it cool down to make the AC stable. If the fan'(s') fail(s), or it stopped running, it(they) may case the AC becomes hoter and hoter, at last, AC need to shut down the computer, because it can protect the other hardwares from damaging.

好大機會係你果火牛有事...電壓唔穩定...我之前都試過...都係突然跳制..,
你試下唔好插任何usb, ..我之前ge問題應該係火牛舊咗,電壓唔夠...一插usb即跳...