It turns off every 30 minutes exact on the dot. No matter what screen im in. I have to put it in sleep mode and wake it every 30 minutes just so it won't shutdown. I think there is something wrong with my bios and cmos, cause my time on the laptop is also off. It's not overheating, nothing wrong with the battery, ive already tried refreshing, reinstalling OS, the fan works fine. I have an Acer Aspire E1. Windows 8. My BIOS options don't have anything about power settings. It also makes a single click noise whenever I start it up.