Toshiba Satellite T135-S1330 shuts down by itself. Tried rebotting in safe mode, shut off all startup programs, restored to previous point, was running a virus check when it shut off again. Has happened about 5 times now. Most recent fix attempt was booting, F2, resetting bios configuration.

Step 1:
Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer You could select the option start at last known configuration that worked this will tell you if and what file has been corrupted or missing then you will know if its a hardware issue You might use the system restore to restore your system to an earlier time click start all programs If it is a hardware issue the system restore might not work Restart your computer repeatedly tapping the f8 key to enter safe mode while the screen is black once in safe mode where the only things working will be your keyboard and mouse allowing you to attempt to repair your computer. Use the system restore to restore your system to an earlier time click start all programs accessories system tools you should see your system restore option if it is a hardware issue the system restore might not work Manual restore points that you specify with the System. Configuration utility Installation restore points that occur before you install a program or a service you can use the system checkpoints or the installation restore points to restore your computer's settings to a date when it operated correctly. This may also help determine the cause of the configuration error.

To perform a system restore, follow these steps: 1.Click Start, click Run, type msconfig, and then click OK. 2.On the General tab, click Launch System Restore. 3.Select Restore my computer to an earlier time, and then click Next. 4.Calendar dates in bold are possible restore points. Click the most recent one to view system restore information. 5.Select a system checkpoint or an installation restore point, and then click Next. 6.Close all other programs. 7.To start the system restore, click Next. 8.Your computer restarts. Repeat steps 1 through 8 until you fix your configuration issue.

Hold the power button in for 10 to 15 seconds for hard shut down if that doesn't work unplug power for about 5 minutes then plug power back in and see what happens

Try F8 upon start-up and use safe mode to boot then try a doing a system restore, it may have installed an update automatically that conflicts somehow

freetek suggested booting to Safe Mode and using Restore function; did a restore to earlier than when problem started, and it worked! However, the nesxt day when I started the laptop again, it returned to the Desktop with no icons or taskbar, causing me to have to remove battery to shut down system. Tried a second Restore to a same checkpoint...would not allow me to re-use that previously used checkpoint, so went one week further back. Did not work and all laptop will do is boot top Desktop with no icons or taskbar and I have to remove the battery to turn it off.

Turn your computer on. Keep pressing the F8 key until the Windows "startup" menu appears. Choose "Safe Mode". Click "Start". Click "All Programs". Click "Accessories". Click "System Tools". Click "System Restore". Select the most-recent "Restore Point" before the problem, and let Windows restore itself to that date/time.

Sounds like a program is not loading properly. You should try to load in Safe Mode, And see if it starts properly. If it does you then can do the diagnostics to find which program is trying to load and shuts machine down. You may also try starting in step by step and catch it right away. Depending on your version of Windows you are running you may be able to restore to a previous time when your machine worked right. Good Luck and have a good day.

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

try to boot in safe mode when prompted on startup when u forcibly shut down ur operating sys it will present u with a screen to select safe mode on startup just go thru safe mode and try using system restore in the Start> All programs> accessories>system tools>system restore try to restore on the earlier date when ur sys was ok see if it helps pls vote if u think i was helpful

Your power management in Windows is corrupted. I would do a system restore to an earlier date.
1.
Click Start, point to All Programs, point to Accessories, point to System Tools, and then click System Restore.
2.
On the Welcome screen, click Restore my computer to an earlier time, and then click Next.
3.
On the Select a Restore Point page, select the date from the calendar that shows the point you'd like to restore to, as shown in Figure 2, and then click Next.

Figure 2
4.
On the Confirm Restore Point Selection page, verify that the correct restore point is chosen, and then close any open programs.
5.
Click Next if you are ready to proceed or click Back to change the restore point.
6.
The computer will shut down automatically and reboot. On reboot, you'll see the Restoration Complete page, and then click OK.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

Try starting up in safe mode by pressing F8 a few times during boot to get the bootup menu. Select safe mode by itself. If you have system restore on then you can try to revert back to right before you installed mcafee. Your machine probably created a restore point right before the software installed. This would be the easiest way to get around this issue. Another way would be to boot into safe mode then go to start -> run and type msconfig then press enter. The System Configuration Utility should come up. Go to the startup tab and uncheck all mcafee related items. Click OK then reboot. McAfee won't start on boot and crash your machine and you can then uninstall it. Be careful with this step though as you could make things worse by unchecking the wrong startup items. Its best to try and revert to a restore point first.