I have a toshiba satellite with windows 8 installed on it. Currently i am having a problem where when i try to shut down the laptop, it restarts and says its due to an error. What is the best course of action to take? Furthermore i have an identical laptop with the exact same specs bought on the same day, however when i try to start the laptop, its says "boot failure: a proper digital signal was not found. One of the files on the selected boot device was rejected by the secure boot feature." Solutions to these problems would be extremely helpful.

It might be to do with Windows 8, but what would be overheating is your processor or RAM. If it is the battery, Windows 8 might be too much drain, or it's simply coincidence and your battery is had it.

hi Mike.
this is all i could find.
Try the following...

1. Power off the laptop.
2. Power on the laptop.
3. As soon as you see the rotating loading circle, press and hold the Power Button until the computer shuts off.
4. Repeat this process a few times until you see the "Preparing Automatic Repair" screen.
5. Now you want to let the laptop boot to the "Automatic Repair" screen.
6. Click "Advanced Options" and then select "Troubleshoot".
7. Here you want to select "Refresh your PC", if you do not wish to erase data, or "Reset your PC" to erase all data and restore your system.
8. From here just follow the screen instructions until the recovery is completed.

NOTE: You will need to get into the "Advanced Options" in order to get the "Refresh Option". This choice will keep your data, but any programs installed will be lost.

Do not do a "Reset" as that will wipe all data you have on the laptop.
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or go to this link and read up in the forum might help.
My laptop keeps restarting and installing windows how do fix this
if that does not help you go to this link.
Toshiba Satellite L655 S5096 Notebook Computer restarted during restore...

I hope that you have a goood back-up of file. Getting blue screen error is a fatal OS problem. You need to re-install windows.You need to get the CD that came with your computer or the operating system disc you used to install the windows. Insert the disc on the CD-DVD drive and restart your computer. Watch for a Press any key to boot from CD or DVD... message. Installation will start. Good Luck!

start the laptop by booting with the windows disk and choose repair install you should find this will work without any problems........cheers from scott

the fan/heatsink asembly is most likely clogged .. causing the thermal controller to kick in a thermal overheating warning and shutting down the laptop

You get BIOS upgrades from Toshiba.

You can download any/all the Windows XP device drivers for your model laptop from the Toshiba WEB site from their download page.
Make sure you enter the model of your laptop so you can get the correct drivers.
Use this link :-.
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/home.jsp#

restart in bios setup
then click to default settings press f10 to save and exit
if problem persists let me know
don't forget to rate

what's on the machine now?

Yes it could be, the notorius GeForce2Go is a replaceable card on that model. I have seen, lines, blurry text, and Boot loop issue caused by it. Be warned, the replacement card is expensive.

Cheaper & better finding a complete laptop with busted screen.
and removing the card only. Then you will also have other spare parts.