As you can see, it's not so difficult to fix an ntdll error, i'm sure that you also know more on the subject of how your windows system is designed. If you are currently thinking of reformatting your hard disk in an attempt to optimize your pc, simply fixing up your registry may save all that trouble. Make these errors a thing of the past; i recommend that you check out the state of the registry as often as possible - it's a good habit to get into. Remember: the computer you sit down at every day is just like anything else you need and value since it requires periodic maintenance to keep it in the best shape possible. Remember to look after your computer's "health" and well-being - if you routinely skip that "tlc," don't be astonished when you have a variety of hassles to worry about.