Most likely to blame update KB3033055.Instructions for removing updates using the command line

1. Thoroughly wipe the contacts on the charger and on the tablet itself.
2. If it did not help,follow this instruction.

You must manually install updates: firstKB2919355thenKB3138615, KB3021910andKB3172614by disconnecting the Internet.

Resetting and restoring Surface using a USB disk (ATTENTION! Reset will delete all your files and programs, before performing these actions, take care to save the information you need on removable media!)

1. Open the right menu, tap the power icon, and then tap Shut down. (Or, click the power icon in the lower right corner of the login screen.)
2. Insert the prepared USB recovery disk with the FAT32 file system (the image can be downloaded from the links in the topic header, just unzip the contents of the archive to a USB root with more than 4GB)
3. Hold down the volume down (-) button.
4. Press and release the power button.
5. When the Surface logo appears, release the volume control.
6. Select the language options.
7. Select a keyboard layout.
8. On the BitLocker screen, click "skip this drive." (the keyboard can close this parameter by itself, click on any area above it to hide it)
9. Click the Troubleshoot button.
10. Click Reset Computer.
11. Click Next. (It appears as a Windows 8.1 recovery button, but Windows 8.0 will actually recover.)
12. Only for Surface Pro: Click "No, save existing partitions." (There will be a similar message on the Surface RT. You need to select "No".)
13. Click "Delete My Files Only"
14. When the message “Everything is ready for operation” appears on the screen, press the “Reset” button (This step may not be displayed and recovery will begin after step 13)

That's it, waiting for the desktop to appear, Surface restored to the factory state. I also recommend disabling the automatic system update (see spoiler below) if you want to use Jailbreak, since in case of upgrading the system to 8.1, Jailbreak is lost.

Open Registry Editor (Run ->regedit) with administrator rights, go to the section "HKEY_LOCAL_MACHINE \ SOFTWARE \ Microsoft \ Windows \ Curr entVersion \ WindowsUpdate \ Auto Update"
Set the AUOptions value to "0" (disable the update completely), or "3" (the ability to install updates manually).

The instruction is relevant only for Windows RT, in version 8.1 RT removable drives are added to the library in the same way as any folder in the device’s memory.

● Type the text “Create section” (without quotes) in the search bar. In the “Disk Management” window that opens, in the lower part you will see a microSD memory card, to which a specific drive letter is assigned.
● Click the second mouse button on “Removable device” and select the item “Change drive letter or drive path ...”
● A window will open with the buttons “Add”, “Delete”, “Change”, in which the last two buttons will be unavailable when the memory card is inserted.
в—Џ Click "Add" and select "Mount volume as an empty NTFS folder". In the window that opens, create a new folder in your user directory. For example, C: \ Users \ your username \ microSD.
в—Џ Select this folder.

Everything. Now you can work with a memory card in the same way as with any other folder in Windows 8 and also add it to the “Video”, “Music”, “Images” libraries. To do this, in Explorer, right-click on this folder, in the list of options that opens, click on “Add to Library” and select the library you want.
After that, applications for working with video files, music files and images will be able to see the files located on the tablet's memory card.

Jailbreak allows you to set classicARM applications (see list below).

в—Џ Installation:

1. Unpack the archive in any folder;
   
2. Run "runExploit.bat";
   
3. Press "R" in the appeared window to start the process;
   
4. After installation, the program will ask you to press the volume button (any);
   
5. In order for the jailbreak not to fly after a reboot, open "runExploit.bat" again and click "I";
   

● Download RT Jailbreak Tool / xda-developers theme.

● List of ARM applications on XDA-Developers
-- PascalABC
-- PCSX Reloaded (PS1 console emulator)

Jailbreak allows you to set classicARM applications (see list below).

в—Џ Installation:

1. DownloadWindows RT 8.1 Development Toolon the tablet. (Windows RT Mod 8.1 Development Tool by Porsche-928)
   
2. Unpack the archive.
   
3. Run the .bat file as an administrator.
   
4. Press any key, a menu will appear:
   
   1 = Modify Windows Update.
   2 = Remove Infected Updates.
   3 = Boot Into Test Mode.
   4 = Boot Into Normal Mode.
   5 = Exit.
5. Select the first item, then 1, to completely disable updates, or 2 or 3, to allow searching / downloading updates.
   
6. Select item 2, after the operation is completed, the device will reboot.
   
7. Run the Jailbreak Tool again as an administrator.
   
8. Select item 3, the device will reboot.
   
9. Done, in the lower right corner should appear "Test mode". Before installing the application, you need to sign or download already signed ones.
   

● Windows RT 8.1 Development Tool on GitHub
● XDA-developers topic
● List of signed applications
● List of ARM applications on XDA-Developers
-- PascalABC
-- PCSX Reloaded (PS1 console emulator)

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