Lenovo Keeps restarting itself in all differnt modes

Google Play Services, the preinstalled app on your phone plays an extremely crucial role in the regular running of your lenvono. If anything is wrong with it, then your lenovo will start throwing fits in the form of errors and crashes including 'Google Play Services keeps stopping' error.
To remove the error, you need to fix Play Services. Here you will find numerous ways to fix any issue related to Play Services. Let's get to know them.
1 Starting with, will actually with restarting you Lenovo.
2 Another that does wonders for any issue is to "clear the cache" and date of the particular app. In this case, we need to clear cache and data for "Google Play Services" and "Google Play Store".
Doing any of that will not delete any data from your phone. However, clearing data will log you out from Play Store and reset its settings. In settings
3 "Google Play Services" is a system app, you cannot remove it from your lenovo completely. However, you can uninstall the updates, which will revert it to the factory version forcing your phone to update it automatically, thus fixing any issue.
On the Google Play Services screen, tap on the "three-dot" icon at the top-right corner. Select Uninstall updates from the menu.
4 Unlike other installed apps, you don't have to update Google Play Services manually. It's done automatically in the background by your lenovo.
However, sometimes, the issue is with the update itself. So you need to update it to the newer or older version manually. We have covered ots of ways to update google play service in detail. Do check that. And if you face any issue while updating it, check fixes.
6 Similar to restart, sometimes booting in the safe mode fixes various issues on an Android phone. Again, doing that will not delete you data and you can access it in safe mode as well. Running the lenovo in safe mode also helps in identifying the issues caused by the third-party apps.
I hope these will get you over your issue with ease.

Your Operating System Might corrupted, try to repair using cd installer or usb bootable device.

The first thing to do is boot it in safe mode and let it go to sleep, then wake it up and see if the problem goes away, If it does then the problem is related to something in the startup programs.

There is a variable (system setting) integrated into the Windows Update tab in the control panel that enables and disables notifications of automatic restart to complete the installation of system updates.

Hello,
It could be an overheating issue. Are there any error messages that pop up when it turns off? Try touching the bottom part of the computer, do you feel any heat or something like that?
Try booting to safe mode and observe if it does the same thing inside safe mode. If it does, then you might need to replace the fan or clean the interior part of your computer.
David

Restarting when? While booting?

If you have having boot problems and the systemkeeps restarting, then turn off the computer, then hit the power button andimmediately start hitting the F8 key repeatedly until you see SAFE MODE. Scrolldown past Safe Mode and you will see an option to DISABLE AUTOMATIC RESTART.Take the Disable Automatic Restart option.

If your are able to access Windows the Screenshot it and paste it onto paint and tell use what it says.

I would recommend that you upgrade the firmware on the device..Once the firmware is update you shouldnt have any problems..To update the firmware follow the link below
http://www.sandisk.com/Retail/Default.aspx?CatID=1376
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Thank you
Computerrep