Error when installing .NET Framework 3.5 - machine 1

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Hi all!

I am having problems on installing .NET Framework 3.5 on some machines. In
one machine the error is:

WinVerifyTrust returned -2146762751
Wintrust not on machine
Error: O arquivo
'C:\DOCUME~1\us er\CONFIG~1\Tem p\VSD22.tmp\Win dowsInstaller3_ 1\WindowsInstal ler-KB893803-v2-x86.exe' foi alterado desde a sua publicação inicial.

Does anyone is having the same error? What is the solution?

The complete log is:

The following properties have been set:
Property: [AdminUser] = true {boolean}
Property: [ProcessorArchit ecture] = Intel {string}
Property: [VersionNT] = 5.1.2 {version}
Running checks for package 'Windows Installer 3.1', phase BuildList
The following properties have been set for package 'Windows Installer 3.1':
Running checks for command
'WindowsInstall er3_1\WindowsIn staller-KB893803-v2-x86.exe'
Result of running operator 'VersionGreater ThanOrEqualTo' on property
'VersionMsi' and value '3.1': false
Result of running operator 'ValueExists' on property 'Version9x': false
Result of running operator 'VersionLessTha n' on property 'VersionNT' and
value '5.0.3': false
Result of running operator 'ValueNotEqualT o' on property
'ProcessorArchi tecture' and value 'Intel': false
Result of running operator 'ValueEqualTo' on property 'AdminUser' and value
'false': false
Result of checks for command
'WindowsInstall er3_1\WindowsIn staller-KB893803-v2-x86.exe' is 'Install'
'Windows Installer 3.1' RunCheck result: Install Needed
Running checks for package '.NET Framework 3.5', phase BuildList
Reading value 'Install' of registry key 'HKLM\Software\ Microsoft\NET
Framework Setup\NDP\v3.5\ 1033'
Unable to read registry value
Not setting value for property 'DotNet35Instal lSuccess'
The following properties have been set for package '.NET Framework 3.5':
Running checks for command 'DotNetFX35\dot NetFx35setup.ex e'
Skipping ByPassIf because Property 'DotNet35Instal lSuccess' was not defined
Result of running operator 'ValueEqualTo' on property 'AdminUser' and value
'false': false
Result of running operator 'ValueExists' on property 'Version9x': false
Result of running operator 'VersionLessTha n' on property 'VersionNT' and
value '5.1.2': false
Result of running operator 'VersionEqualTo ' on property 'VersionNT' and
value '5.2.0': false
Result of running operator 'ValueEqualTo' on property
'ProcessorArchi tecture' and value 'IA64': false
Result of checks for command 'DotNetFX35\dot NetFx35setup.ex e' is 'Install'
'.NET Framework 3.5' RunCheck result: Install Needed
EULA for components 'Windows Installer 3.1' was accepted.
EULA for components '.NET Framework 3.5' was accepted.
Copying files to temporary directory
"C:\DOCUME~1\us er\CONFIG~1\Tem p\VSD22.tmp\"
Downloading files to "C:\DOCUME~1\us er\CONFIG~1\Tem p\VSD22.tmp\"
(7/8/2008 09:57:49) Downloading
'WindowsInstall er3_1\WindowsIn staller-KB893803-v2-x86.exe' from
'http://go.microsoft.co m/fwlink/?LinkId=49256' to
'C:\DOCUME~1\us er\CONFIG~1\Tem p\VSD22.tmp\'
Download completed at 7/8/2008 09:57:50
Verifying file integrity of
C:\DOCUME~1\use r\CONFIG~1\Temp \VSD22.tmp\Wind owsInstaller3_1 \WindowsInstall er-KB893803-v2-x86.exe
WinVerifyTrust returned -2146762751
Wintrust not on machine
(7/8/2008 09:57:50) Downloading 'DotNetFX35\dot NetFx35setup.ex e' from
'http://go.microsoft.co m/fwlink/?LinkId=97964' to
'C:\DOCUME~1\us er\CONFIG~1\Tem p\VSD22.tmp\'
Download completed at 7/8/2008 09:57:51
Verifying file integrity of
C:\DOCUME~1\use r\CONFIG~1\Temp \VSD22.tmp\DotN etFX35\dotNetFx 35setup.exe
WinVerifyTrust returned -2146762751
Wintrust not on machine
Running checks for package 'Windows Installer 3.1', phase BeforePackage
The following properties have been set for package 'Windows Installer 3.1':
Running checks for command
'WindowsInstall er3_1\WindowsIn staller-KB893803-v2-x86.exe'
Result of running operator 'VersionGreater ThanOrEqualTo' on property
'VersionMsi' and value '3.1': false
Result of running operator 'ValueExists' on property 'Version9x': false
Result of running operator 'VersionLessTha n' on property 'VersionNT' and
value '5.0.3': false
Result of running operator 'ValueNotEqualT o' on property
'ProcessorArchi tecture' and value 'Intel': false
Result of running operator 'ValueEqualTo' on property 'AdminUser' and value
'false': false
Result of checks for command
'WindowsInstall er3_1\WindowsIn staller-KB893803-v2-x86.exe' is 'Install'
'Windows Installer 3.1' RunCheck result: Install Needed
Verifying file integrity of
C:\DOCUME~1\use r\CONFIG~1\Temp \VSD22.tmp\Wind owsInstaller3_1 \WindowsInstall er-KB893803-v2-x86.exe
WinVerifyTrust returned -2146762751
Wintrust not on machine
Error: O arquivo
'C:\DOCUME~1\us er\CONFIG~1\Tem p\VSD22.tmp\Win dowsInstaller3_ 1\WindowsInstal ler-KB893803-v2-x86.exe' foi alterado desde a sua publicação inicial.

Thank you,
Vanessa