What could cause prerequisites not to install

Development Getting Started & Setup
, ,
1

when i try to launch the engine it says
Device restart required
The recent installation requires a system restart to complete
prerequisite for unreal engine failed to install

Error code:LS-0019-IS-PQR13010
what could be the issue?.

2

Check this: http://www.jeuxvideo.com/forums/42-31-58423338-1-0-1-0-unreal-engine-4-code-erreur-ls-0019-is-pqr3010.htm or https://answers.unrealengine.com/questions/833968/view.html