1. If the computer is on, turn it off. 2. Disconnect the AC Adapter and remove the computerÂs battery. 3. Press and hold down the power button for 5 seconds and then release the button. 4. Reconnect the battery and AC Adapter. 5. Press the Power button to restart the computer.

are you using it on your lap on a soft surface that could be closing off the vents on the bottom? Laptops will get very over heated if their vents are not fully open and over heating will cause one to shut off to prevent further damages, the noise could be a fan that is going bad. I think I would have it looked at. You can buy air circulating pads to put a laptop on that have little fans in them which help to keep them cool and the air circulating under them. here are a couple of different type examples Cooler Master Notepal X2 Notebook Cooler R9-NBC-4WAK-GP Cooler Master Notepal U2 Notebook Cooler with Two Fans be sure you read the reviews on the laptop coolers because some are not worth the money. Also some use the power of the pc through the usb port and some plug into a power supply, those have much more power and strength to cool with out tasking the laptop usb power supply. When it does this is it running on battery power on plugged in? could make a difference, many will run hot with battery.

What type of Mouse is it, Ball, Optical or Laser? If it's an Optical or Laser, you may try cleaning the lens on the bottom of the mouse. BTW, Yes Rechargeable Batteries do go bad and need replaced, but to me it doesn't sound like the batteries. If by some chance you have a mouse with a Ball in the bottom (Old Style Mouse), there are 3 Rollers inside that may need cleaning.

Probably. This is actually a pretty common failure mode for a battery. Computers and other devices that indicate a battery percentage calculate that percentage by comparing the battery's voltage to a table of standard voltage values correlating to different levels of charge for that particular battery. When your battery is showing 90 percent it's being charged because the computer is plugged in, and the computer is being powered by line current from the electrical outlet. As soon as you pull the plug this puts the battery under load, and its voltage drops very quickly, most likely due to high internal resistance in the battery. Your computer was fooled into thinking that the battery was 90 percent charged because the voltage attained a value that in a good battery would indicate 90 percent charge, but in this battery it doesn't. Notebook computer batteries can fail fairly quickly if they're left charging constantly, as many are. Newer computers may have better charging control circuits to somewhat lessen the effects of this, but a good battery-saving practice is still to unplug a notebook computer when you're not using it rather than leaving it plugged in 24/7. (This is because, even with charging control circuits, the computer will keep the battery topped back up to 100 percent every time it drops a percent or two, creating repeated charge/discharge cycles that shorten a battery's life.) For a rarely used device, recharge the battery often enough to prevent it from sitting in a deeply-discharged state. Leaving a battery sit "dead" a long time can also damage it.