My laptop randomly shuts down when I'm using it. I've tried restoring it to the manufacturer's settings but that did not help. Also I cannot connect to the internet at times. I try restarting the computer and also turning the wireless key off and on. This does not make any difference. Can you help?

remove the wifi drivers reboot the system then install it ,

try using a cooler pad for your laptop for heating issue,
try changing the RAM also sometimes the faulty RAM also does this

Restore Toshiba to Out of the Box Condition
If your model Toshiba laptop has a Restore partition on the hard drive then follow these steps to restore your Toshiba to the Out of the Box condition.
1. Press and hold the 0 (zero) key and at the same time, tap the power button once to switch on
your notebook.
2. When the machine Starts beeping; release the 0 key.
3. When prompted by the warning screen; select Yes to continue with the system recovery.
4. Select Recovery of Factory Default Software; click Next.
5. Select Recover to out-of-box state. 6. Click Next again.
7. Click Next to Start recovery.
8. Restart the Toshiba laptop when there restoration process finishes running. Follow the prompts that appear on the screen to set up the laptop's date, time and language settings.

Tell them to give you a NEW computer. You got a lemon. They WILL give you a new one if you've had this much trouble with it. I'm serious, they do it all the time on lemons. Be assertive! They will cave.

TRY HOOKING THE LAPTOP TO AN EXTERNAL MONITOR IF THE MMONITOR IS OK. THEN ITS THE CABLE CONNECTING THE KEYBOARD TO THE SCREEN. HOPE THIS HELPS. THS HAPPENED TO ME GOOD LUCK

After you've used your laptop for an extended period of time its hard drive may become filled with files you don't want or even infected with malicious virus programs downloaded from the Internet. If you don't want to go through the folders on your laptop and manually delete each unnecessary file you can restore the computer to its original factory settings instead. Restoring a laptop wipes out any existing data and entirely reinstalls the operating system.

1.Place the operating system recovery CD that came with your computer into the CD or DVD drive. Restart the computer.
2.Wait for the computer manufacturer's logo to pop up on the screen. Press the keyboard key that brings up the recovery menu, which is usually "F2," "F8," or "Ctrl" and "F11" pressed simultaneously.
3.Select the specific language you want the operating system to use from the menu at the top of the screen. Select "Next."
4.Choose the option labeled "PC Restore," "Repair Your Computer" or something similar. Click "Next."
5.Select "Restore" and then click "Enter" to start the process. Click "Restart" once the process has ended to boot the restored computer to its operating system.

Hi,

The BOOTMGR is also known as the "Boot Manager." That means that there is something wrong with the hard drive. You would need to copy that BOOTMGR file from the Windows disc that your laptop would've came with. Otherwise, you would need to restore the computer to it's factory settings.

Now, who's the laptop's manufacturer? I suggest you call them and have them assist you restoring your laptop to it's original factory settings, like when you first bought it.

If you have some problems. Don't hesitate to leave a comment and I'll get back to you.

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Have a good one...

Oliver

Go to novatecdirect.com they can help, i unlocked my dell latitude using their unlock services, they have master passwords for that problem.
and it works for me all the time

Maybe setting of shutdown start begining, try to restore system setting.Thx

BIOS setting for automatic power on?