When you try to install an update for the .NET Framework 1.0, 1.1, 2.0, 3.0, or 3.5, you may receive Windows Update error code "0x643" or Windows Installer error code "1603" - Microsoft SupportNotice How to obtain help and support for this security update Help installing updates: Support for Microsoft Update Security solutions for IT professionals: TechNet Security Troubleshooting and Support Help protect your computer that is running Windows from viruses and malware: Virus Solution and Security Center Local support according to your country: International Support Symptoms of the proble
Download Windows Installer 3.1 Redistributable (v2) - 日本語 from Official Microsoft Download Center
