It's therefore essential that if you want to repair an mfc71 dll is missing error the first matter to be dealt with is to see if your registry system is fully operational. Registry keys that are no longer needed can in some cases hang up windows - the best and easiest solution to try to find these keys is by employing a repair tool. I suggest that you go ahead and download your choice of registry tools and run a search; you have nothing to lose and most likely you can get rid of these errors soon. Avoid computer hassles by remembering that your pc is similar to the car you drive since it requires periodic maintenance if you want to keep it functioning at its best. Perhaps you can think of some coworkers or friends who always seem to be adding/removing programs and may be having troubles as a result - they will no doubt regard this tip as well worth reading.