Windows error 0x0 0x0 occurs when the Windows Installer fails or crashes during startup, as the name implies. This does not necessarily suggest that the code was corrupted in any manner, but rather that it did not work when run. Unless managed and repaired, this type of issue will appear as an obnoxious message on your screen. The causes, symptoms, and troubleshooting methods are listed below. The Error 0x0 0x0 error is frequently the consequence of registry clutter or defective entries of non-existent applications that generally persist in the registry after inappropriate software removal. Other typical reasons of system problems include poorly entered data or missing files that were mistakenly removed from the registry. It is quite helpful in troubleshooting to keep note of when and where mistakes occur.