Humm had a similar problem. Office 2007 would get stuck at Proof.cab. What
worked for me was to simply eject the DVD tray, resinserted the DVD, hit ok
on the dialog and the installer continued without problem.

"Frank Laurijssens" wrote:

I'm having problems again installing Office 2007 on a localized Vista
Ultimate x86. The setup stalls and asks for Proof.cab.

The only trace I can find about this error in SetupExe(..).log is:

Executing chained package: Proof.es-es
04/19/2007 18:59:13 Installing chained package: Proof.es-es
PERF: TickCount=2340108 Name=Verify MSI local install source
Description=Begin function
OSE is detected as a registered service. Service binary is reported at
location: C:\Program Files\Common Files\Microsoft Shared\Source
Engine\OSE.EXE
OSE service binary is detected at location: C:\Program Files\Common
Files\Microsoft Shared\Source Engine\OSE.EXE
File at H:\Ultimater.WW\ose.exe has version: 12.0.4518.1014
File at C:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE
has version: 12.0.4518.1014
Running OSE version 12.0.4518.1014
OSE is detected as a registered service. Service binary is reported at
location: C:\Program Files\Common Files\Microsoft Shared\Source
Engine\OSE.EXE
OSE service binary is detected at location: C:\Program Files\Common
Files\Microsoft Shared\Source Engine\OSE.EXE
File at H:\Ultimater.WW\ose.exe has version: 12.0.4518.1014
File at C:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE
has version: 12.0.4518.1014
Running OSE version 12.0.4518.1014
OSE is detected as a registered service. Service binary is reported at
location: C:\Program Files\Common Files\Microsoft Shared\Source
Engine\OSE.EXE
OSE service binary is detected at location: C:\Program Files\Common
Files\Microsoft Shared\Source Engine\OSE.EXE
File at H:\Ultimater.WW\ose.exe has version: 12.0.4518.1014
File at C:\Program Files\Common Files\Microsoft Shared\Source Engine\OSE.EXE
has version: 12.0.4518.1014
Running OSE version 12.0.4518.1014
LIS: wait for package "{90120000-002C-0409-0000-0000000FF1CE}" to complete
caching
LIS failed to cache download "{90120000-002C-0409-0000-0000000FF1CE}-C"
resource "Proof.en|Proof.cab". Cache Error 0x80070017
Source Resolution succeeded
LIS: start caching file "Proof.en|Proof.cab"
LIS failed to cache download "{90120000-002C-0409-0000-0000000FF1CE}-C"
resource "Proof.en|Proof.cab". Cache Error 0x80070017

The CAB file is there, installing O2k7 on Windows XP (any language) works
flawlessly. Excluding all proofing tools from setup doesn't help.

What's going on here?