Accidentaly turned off lappy updte instl,now automaticaly shuts

I have a problem with my Dell laptop. The thing is i unfortunately turned off my laptop during the installation of updates. It was doing 1 of 5 update.It kept going on,i thought it has stuck so better to restart it,but whenever i try to start my laptop,after sometimes like 1 or 5 mins or even after 1 hr it automatically gets shutdown automatically,luckily when i started my laptop after some 1,2 hours that installation part i.e 1 of 5,2 0f 5...5 of 5 was done but still it gets automatically shutdown. Also when my laptop started it asks me two options Launch repair and Start Windows Normally,when i choose Launch Repair it do his work but when it is Attempting Repairs,my laptop shutdowns again,what should i do?