Internet Explorer 11 not installating

Hi,

I have  Problems installing Internet Explorer 11 on one single Client.
In th IE11_main.log there is following error message:

Neutral package installation failed (exit code = 0x800b0100 (2148204800))

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I downloaded an ran Update Readiness tool and found many missing files. A took the files from another Client and reran the Readiness Tool and most of the Errors went away.

At the Moment I still have following error:

Checking System Update Readiness.
Binary Version 6.1.7601.22471
Package Version 26.0
2015-02-26 15:17

Checking Windows Servicing Packages

Checking Package Manifests and Catalogs

Checking Package Watchlist

Checking Component Watchlist

Checking Packages
(f)	CBS MUM Missing	0x00000002	servicing\Packages\Package_for_KB2957689~31bf3856ad364e35~amd64~~10.2.1.0.mum		

Checking Component Store

Summary:
Seconds executed: 1196
 Found 1 errors
  CBS MUM Missing Total count: 1

Unavailable repair files:
	servicing\packages\Package_for_KB2957689~31bf3856ad364e35~amd64~~10.2.1.0.mum
	servicing\packages\Package_for_KB2957689~31bf3856ad364e35~amd64~~10.2.1.0.cat

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I unpacked all packages of KB2957689 but there is no "Package_for_KB2957689~31bf....." There is only a Package with "rtm" in filename.

I also installed the KB2957689 but the IE11 Installation is still failing.

Does anybody know what I can do next?

Does anybody know that error?