Recently I installed windows technical preview to test the features. So currently I have 2 operating system listed in boot menu. Windows 8.1 & Technical Preview( I installed Windows technical preview in other drive and that installation was not a update from previous version ).

So how can I remove the technical preview ? Initially I though to remove all the OS files from the harddrive.But I guess that it may cause some issues on booting. Could you please suggest me to remove the latest OS safely?



Use msconfig (under the boot tab) or Easybcd to remove the boot entry for Windows Technical Preview. Then use a partition manager (diskpart, gparted, paragon, etc.) to delete the Technical Preview partition and then grow your Windows 8.1 partition to use the whole hard drive. 

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