Registry cleaners are definitely the shortest path to fix an ntdll application error and
, as it happens, the least risky when dealing with such a complex and vulnerable system. With these specialized programs, you have the power to maintain your computer "on all cylinders" and that it is virtually free of problems. Something else you might want to try in order to stop these errors is installing updated system files, and thus purge your computer of troubles that are caused by old / corrupted files. Surely in the years (months, perhaps?) to come we will all be using a registry cleaning tool, which, besides your chosen anti-viral program is helpful for a variety of computer issues. When you keep in mind the information that i've provided above you will see a big improvement in how well and how fast you work, and how much you enjoy it.