Helper.dll errors are caused by situations that lead to the removal or corruption of the helper DLL file.

Follow these steps in the order they are listed below to try the simpler solutions first.

Recover helper.dll from Recycle Bin. The simplest possible cause of a "missing" helper.dll file is that you accidentally deleted it.

If you suspect this, but you've already emptied the Recycle Bin, you may be able to recover the file using a free file recovery program. Remember, only do this if you're certain the file was working properly before it was deleted (i.e., not corrupted or malicious).