Update: I tried each of the given solutions none of them worked.
After a couple of days of the update and constant force resrarting upon freeze the Laptop stopped booting. Thr backlit keyboard would lit but nothing on the screen and then it would turn off. Couldn't get it to boot. Took it to a Lenovo Service centre. They said the motherboard IC is at fault and would require a change. It costed me hefty Rs. 9000 which is around $150.
I was even asked to reset the system which I did. The laptop worked fine for exactly ONE week and then same problem. Took it back to the service centre and they kept the laptop for 3-4 days. They ran their tests. Installed 1802 version of Windows 10. Still the issue persists. Even they don't know what the issue is.
So at this point I have a dead $1700 laptop a $150 service centre bill.
Additional info: I bought this laptop from Best Buy, FL, US and currently I am in India. Lenovo doesn't have service centre to call their OWN, they have outsourced them to local firms and provide authorised ones on their website.