Update fails: temp file fails verification

Hello,

My installation of MikTeX 2.9 broke during an update. I am using a Windows 7 Enterprise.

MikTeX Update Wizard (Admin)
The operation could not be completed for the following reason:
The operation could not be completed because the following file failed verification:
C:\Users\<user>\AppData\Local\Temp\mik5AC8.tmp

It does not matter whether I am a user with a low privilege or the local Administrator. Nor does it matter which repository I use.

MiKTeX Update Wizard Report

Version: 2.9.4745
Date: Friday, March 08, 2013
Time: 16:00:30
starting package maintenance...
installation directory: "C:\Program Files (x86)\MiKTeX 2.9"
package repository: http://mirrors.med.harvard.edu/ctan/systems/win32/miktex/tm/packages/
lightweight database digest: 4ab85e12cf451ec0bb6c3eaae69a6936
going to download 69081995 bytes
going to install 1795 file(s) (83 package(s))
downloading http://mirrors.med.harvard.edu/ctan/systems/win32/miktex/tm/packages/relsize.tar.lzma...
339 bytes, 3.81 KB/Sec
visiting repository http://mirrors.med.harvard.edu/ctan/systems/win32/miktex/tm/packages/...
repository type: remote package repository
loading lightweight database...
downloading http://mirrors.med.harvard.edu/ctan/systems/win32/miktex/tm/packages/miktex-zzdb1-2.9.tar.lzma...
130622 bytes, 529.30 KB/Sec
lightweight database digest: 4ab85e12cf451ec0bb6c3eaae69a6936

Error: The operation could not be completed because the following file failed verification:

C:\Users\<user>\AppData\Local\Temp\mik5AC8.tmp

Any suggestions?

Thank you,
Joseph


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