Error: Code 1330 - "Error 1330. A file that is required cannot be installed because the cabinet file C: \Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\ has an invalid digital signature. ""Error 1330"" when installing a Java Runtime Environment 6 update. Caus

How to fix the Runtime Code 1330 A file that is required cannot be installed

This article features error number Code 1330, commonly known as A file that is required cannot be installed described as "Error 1330. A file that is required cannot be installed because the cabinet file C: \Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\ has an invalid digital signature. ""Error 1330"" when installing a Java Runtime Environment 6 update. Caus

About Runtime Code 1330

Runtime Code 1330 happens when Java Runtime Environment fails or crashes whilst it's running, hence its name. It doesn't necessarily mean that the code was corrupt in some way, but just that it did not work during its run-time. This kind of error will appear as an annoying notification on your screen unless handled and corrected. Here are symptoms, causes and ways to troubleshoot the problem.

Definitions (Beta)

Here we list some definitions for the words contained in your error, in an attempt to help you understand your problem. This is a work in progress, so sometimes we might define the word incorrectly, so feel free to skip this section!

  • Appdata - Used for questions relating to the user application data folders
  • Cab - cab is the file extension for the Cabinet archive format used in Microsoft Windows.
  • Digital signature - mathematical scheme for demonstrating the authenticity of a digital message or document Wikipedia
  • Environment - The OS in which a process is executed, especially settings that affect the process
  • File - A block of arbitrary information, or resource for storing information, accessible by the string-based name or path
  • Java - Java not to be confused with JavaScript or JScript is a general-purpose object-oriented programming language designed to be used in conjunction with the Java Virtual Machine JVM
  • Required - Required is an HTML attribute of an input element that forces that the input be supplied.
  • Runtime - Runtime is the time during which a program is running executing
  • Signature - In computer programming, especially object-oriented programming, a method is commonly identified by its unique method signature, which usually includes the method name, and the number, types and order of its parameters
  • Sun - Sun Microsystems is a computer company, bought by Oracle in January 2010
  • Username - A set of characters used to identify the account of a person to a system.
  • Installing - The process of installation is the deployment of an application onto a device for future execution and use.
  • .java - Java not to be confused with JavaScript or JScript is a general-purpose object-oriented programming language designed to be used in conjunction with the Java Virtual Machine JVM

Symptoms of Code 1330 - A file that is required cannot be installed

Runtime errors happen without warning. The error message can come up the screen anytime Java Runtime Environment is run. In fact, the error message or some other dialogue box can come up again and again if not addressed early on.

There may be instances of files deletion or new files appearing. Though this symptom is largely due to virus infection, it can be attributed as a symptom for runtime error, as virus infection is one of the causes for runtime error. User may also experience a sudden drop in internet connection speed, yet again, this is not always the case.

Fix A file that is required cannot be installed (Error Code 1330)
(For illustrative purposes only)

Causes of A file that is required cannot be installed - Code 1330

During software design, programmers code anticipating the occurrence of errors. However, there are no perfect designs, as errors can be expected even with the best program design. Glitches can happen during runtime if a certain error is not experienced and addressed during design and testing.

Runtime errors are generally caused by incompatible programs running at the same time. It may also occur because of memory problem, a bad graphics driver or virus infection. Whatever the case may be, the problem must be resolved immediately to avoid further problems. Here are ways to remedy the error.

Repair Methods

Runtime errors may be annoying and persistent, but it is not totally hopeless, repairs are available. Here are ways to do it.

If a repair method works for you, please click the upvote button to the left of the answer, this will let other users know which repair method is currently working the best.

Please note: Neither nor it's writers claim responsibility for the results of the actions taken from employing any of the repair methods listed on this page - you complete these steps at your own risk.

When you get a runtime error, keep in mind that it is happening due to programs that are conflicting with each other. The first thing you can do to resolve the problem is to stop these conflicting programs.
  • Open Task Manager by clicking Ctrl-Alt-Del at the same time. This will let you see the list of programs currently running.
  • Go to the Processes tab and stop the programs one by one by highlighting each program and clicking the End Process buttom.
  • You will need to observe if the error message will reoccur each time you stop a process.
  • Once you get to identify which program is causing the error, you may go ahead with the next troubleshooting step, reinstalling the application.
Using Control Panel
  • For Windows 7, click the Start Button, then click Control panel, then Uninstall a program
  • For Windows 8, click the Start Button, then scroll down and click More Settings, then click Control panel > Uninstall a program.
  • For Windows 10, just type Control Panel on the search box and click the result, then click Uninstall a program
  • Once inside Programs and Features, click the problem program and click Update or Uninstall.
  • If you chose to update, then you will just need to follow the prompt to complete the process, however if you chose to Uninstall, you will follow the prompt to uninstall and then re-download or use the application's installation disk to reinstall the program.
Using Other Methods
  • For Windows 7, you may find the list of all installed programs when you click Start and scroll your mouse over the list that appear on the tab. You may see on that list utility for uninstalling the program. You may go ahead and uninstall using utilities available in this tab.
  • For Windows 10, you may click Start, then Settings, then choose Apps.
  • Scroll down to see the list of Apps and features installed in your computer.
  • Click the Program which is causing the runtime error, then you may choose to uninstall or click Advanced options to reset the application.
Virus infection causing runtime error on your computer must immediately be prevented, quarantined or deleted. Make sure you update your virus program and run a thorough scan of the computer or, run Windows update so you can get the latest virus definition and fix.
You might be getting the error because of an update, like the MS Visual C++ package which might not be installed properly or completely. What you can do then is to uninstall the current package and install a fresh copy.
  • Uninstall the package by going to Programs and Features, find and highlight the Microsoft Visual C++ Redistributable Package.
  • Click Uninstall on top of the list, and when it is done, reboot your computer.
  • Download the latest redistributable package from Microsoft then install it.
You might also be experiencing runtime error because of a very low free space on your computer.
  • You should consider backing up your files and freeing up space on your hard drive
  • You can also clear your cache and reboot your computer
  • You can also run Disk Cleanup, open your explorer window and right click your main directory (this is usually C: )
  • Click Properties and then click Disk Cleanup
If the error is related to a bad graphics driver, then you may do the following:
  • Open your Device Manager, locate the graphics driver
  • Right click the video card driver then click uninstall, then restart your computer
If the error you are getting is related to the Internet Explorer, you may do the following:
  1. Reset your browser.
    • For Windows 7, you may click Start, go to Control Panel, then click Internet Options on the left side. Then you can click Advanced tab then click the Reset button.
    • For Windows 8 and 10, you may click search and type Internet Options, then go to Advanced tab and click Reset.
  2. Disable script debugging and error notifications.
    • On the same Internet Options window, you may go to Advanced tab and look for Disable script debugging
    • Put a check mark on the radio button
    • At the same time, uncheck the "Display a Notification about every Script Error" item and then click Apply and OK, then reboot your computer.
If these quick fixes do not work, you can always backup files and run repair reinstall on your computer. However, you can do that later when the solutions listed here did not do the job.
Other languages:

Wie beheben Fehler 1330 (Eine erforderliche Datei kann nicht installiert werden) - "Fehler 1330. Eine erforderliche Datei kann nicht installiert werden, da die CAB-Datei C:\Benutzer\Benutzername\AppData\LocalLow\Sun\Java\jre1.6.0_18\ eine ungültige digitale Signatur hat. ""Fehler 1330" " bei der Installation eines Java Runtime Environment 6-Updates. Ursache
Come fissare Errore 1330 (Non è possibile installare un file richiesto) - "Errore 1330. Impossibile installare un file richiesto perché il file CAB C: \Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\ ha una firma digitale non valida. ""Errore 1330" " durante l'installazione di un aggiornamento di Java Runtime Environment 6. Causa
Hoe maak je Fout 1330 (Een vereist bestand kan niet worden geïnstalleerd) - "Fout 1330. Een vereist bestand kan niet worden geïnstalleerd omdat het cabinetbestand C: \Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\ een ongeldige digitale handtekening heeft. ""Fout 1330" " bij het installeren van een Java Runtime Environment 6-update. Oorzaak
Comment réparer Erreur 1330 (Un fichier requis ne peut pas être installé) - "Erreur 1330. Un fichier requis ne peut pas être installé car le fichier CAB C:\Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\ a une signature numérique non valide. ""Erreur 1330" " lors de l'installation d'une mise à jour de Java Runtime Environment 6. Cause
어떻게 고치는 지 오류 1330 (필요한 파일을 설치할 수 없습니다) - "오류 1330. 캐비닛 파일 C: \Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\Data1.cab에 잘못된 디지털 서명이 있으므로 필요한 파일을 설치할 수 없습니다. ""오류 1330" " Java Runtime Environment 6 업데이트를 설치할 때. 원인
Como corrigir o Erro 1330 (Um arquivo necessário não pode ser instalado) - "Erro 1330. Um arquivo necessário não pode ser instalado porque o arquivo de gabinete C: \ Usuários \ Nome de usuário \ AppData \ LocalLow \ Sun \ Java \ jre1.6.0_18 \ tem uma assinatura digital inválida." "Erro 1330" "ao instalar uma atualização do Java Runtime Environment 6. Causa
Hur man åtgärdar Fel 1330 (En fil som krävs kan inte installeras) - "Fel 1330. En fil som krävs kan inte installeras eftersom skåpfilen C: \ Users \ Användarnamn \ AppData \ LocalLow \ Sun \ Java \ jre1.6.0_18 \ har en ogiltig digital signatur." "Fel 1330" "när du installerar en uppdatering av Java Runtime Environment 6. Orsak
Как исправить Ошибка 1330 (Требуемый файл не может быть установлен) - «Ошибка 1330. Требуемый файл не может быть установлен, поскольку C: \ Users \ Username \ AppData \ LocalLow \ Sun \ Java \ jre1.6.0_18 \ файл CAB имеет недопустимую цифровую подпись.» «Ошибка 1330» "при установке обновления Java Runtime Environment 6. Причина
Jak naprawić Błąd 1330 (Nie można zainstalować wymaganego pliku) - "Błąd 1330. Nie można zainstalować wymaganego pliku, ponieważ plik CAB C: \Users\Username\AppData\LocalLow\Sun\Java\jre1.6.0_18\ ma nieprawidłowy podpis cyfrowy. ""Błąd 1330" " podczas instalowania aktualizacji środowiska Java Runtime Environment 6. Przyczyna
Cómo arreglar Error 1330 (No se puede instalar un archivo necesario) - "Error 1330. No se puede instalar un archivo necesario porque el archivo contenedor C: \ Users \ Username \ AppData \ LocalLow \ Sun \ Java \ jre1.6.0_18 \ tiene una firma digital no válida". "Error 1330" "al instalar una actualización de Java Runtime Environment 6. Caus

The Author About The Author: Phil Hart has been a Microsoft Community Contributor since 2010. With a current point score over 100,000, they've contributed more than 3000 answers in the Microsoft Support forums and have created almost 200 new help articles in the Technet Wiki.

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