Restoring the pre-installed software from the
Recovery Partition
A portion of the total storage space is configured as a hidden recovery
partition. This partition stores files which can be used to restore pre-
installed software in the event of a problem.
If you subsequently set up your storage space again, do not change, delete
or add partitions in a manner other than specified in the manual, otherwise
you may find that space for the required software is not available.
In addition, if you use a third-party partitioning program to reconfigure the
partitions on your storage space, you may find that it becomes impossible
to setup your tablet.
Make sure that the AC adaptor are connected during the restoring process.
When you reinstall the Windows operating system, the storage space may
be reformatted and all data may be lost.
1. In the Settings charm, tap Power and then select Shut down.
2. After completely shut down the tablet, wait for about 10 seconds. Then
hold down the Power button and Volume up button simultaneously
until the Boot menu is loaded and then select HDD Recovery.
3. A dialog box will appear asking if you are sure you wan to continue.
Select Yes.
4. Select Troubleshoot.
5. Select Reset your PC.
6. Follow the on screen instructions to finish the recovery.
You can also perform the restoration through PC settings in the operating
system:
1. Tap the Settings charm and tap Change PC settings.
2. Tap Update and recovery under PC settings and then tap Recovery.
3. Tap Get started under Remove everything and reinstall Windows.
4. Follow the on screen instructions to finish the recovery.
http://www.argos-support.co.uk/ctrl-data/uploads/files/3078015_D001.pdf
Macht man da und danach installiert man W10 als Upgrade.
http://aps2.toshiba-tro.de/kb0/HTD4103K90000R01.htm
Im Prinzip sollte man da auch per Enter Setup im Biosmenü das booten von USB aktivieren können und dann W10 per Stick installieren können (oder auch direkt von nem USB Stick booten), da sind dann aber AFAIK etliche Treiber nötig...