authz.dll errors are one of the most serious situations faced on the Windows system. This dll error does not allow you to open or access the executable files present on the system and sometimes can lead to system freezes or crashes, various exe or runtime errors etc. Many reasons can be responsible for this error such as registry issues, old drivers, virus attack etc. so, knowing the error cause you can perform its corresponding resolution. In case if the driver needs updation, then use Driver updater software. But if there are issues related with registry, you can opt for Registry repair software that is capable enough to delete all the corrupt or invalid entries from the registry editor and thus you can easily fix authz.dll error. For more info http://www.authzdllerrorfix.com