hp elitebook 8730w

I bought 2 HP Elitebooks 8730w 17" laptops for less than $150 each back in 2017. One of them works fine, while the other constantly often fails to boot Windows. It fails about 70-80% of the time (at least). While Linux (Ubuntu 16.04) will be successfull (at least 90% of the time). For Windows...