Re: [Win7SP1 x64] Unable to install Windows Updates. WU error code 0x80070643.
The file you mentioned does not exist (see attachment 'temp directory contents.png')
And, I don't know if this will help, but before I opened this thread I tried installing .Net 4.5.2 via the standalone install package (i.e. outside of Windows Update). It reported a problem with the Windows Installer. But, I was able to install another program, so I'm totally confused if this is a Windows Installer issue, a Windows Update issue, or there is some other corruption. See 'Standalone 4.5.2 install failure.png' for the exact wording.
Mahalo for your assistance!