Computer troubles can happen at the most inconvenient moments, and a ntkrnlpa exe problem can be surprising and very troublesome; but if you'll just read the next few paragraphs, I will share some helpful information which will enable you to get rid of it quite fast.
In the majority of instances, these error messages are a result of problems with the registry - this is the place where windows records all the sw and hw when you do installations, deinstallations, or updates on your pc. It's only a matter of time before you accumulate a lot of software on your computer, and it is not uncommon to experience a bad installation/removal from time to time; this can sometimes cause the appearance of a ntkrnlpa exe problem, a drop in your computer's level of performance, and more.
What might be happening is that various segments of the pc's registry have become damaged in some way, which causes windows to behave strangely and often quit when attempting to open or run various applications on your pc; in this case, windows displays those error messages you so hate to see. At any rate, this should not be a source of worry, since as i mentioned in the beginning it is easily fixed in most cases.
Before you decide to get the problem solved by an expensive repair service, or attempt to straighten out the 'contaminated' registry all by yourself - stop! It is not a difficult job to repair a ntkrnlpa exe problem; even if your technical skills are minimal, you can take advantage of specialized registry repairing tools that locate registry problems in your system and then instantly repair them. Most of these programs (the professional ones) give you, free-of-charge, the opportunity to scan and repair your registry, so there's no reason not to download such a tool and let it take care of your registry problem; get going with this immediately and with just a few clicks of your mouse you'll rid your computer of those frustrating errors once and for all.