Framework 3.5 Update Fail

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If you are having dot Net Framework 3.5 Update installation issues, then run the following commands to clear up the issue with the updates.

Event log showed **Error 1325.’Microsoft.NET’ is not a valid short file name. **

Create PowerShell Script file .ps1

Note: PowerShell must be installed check windows installed updates from appwiz.cpl

`# determine the framework and ebs guids. these will be unique for each install $productskey = “HKLM:SOFTWAREClassesInstallerProducts" $installedproducts = get-childitem $productskey $guidstofix = 1..6 foreach ($product in $installedproducts) { $product = $product -replace(“HKEY_LOCAL_MACHINE”,“HKLM:") $PackageCode = get-itemproperty -path $product -name “PackageCode" if ($PackageCode.PackageCode -match “4C78A69B7517C0446978C7906EBD7950”) { $guidstofix[0] = $PackageCode.PackageCode $guidstofix1 = $product.Substring($product.LastIndexOf("")+1) } elseif ($PackageCode.PackageCode -match “971651411F68D9B4CAF6FCDFB652BB9F”) { $guidstofix2 = $PackageCode.PackageCode

get the guid from the name of the key

$guidstofix3 = $product.Substring($product.LastIndexOf("")+1) } elseif ($PackageCode.PackageCode -match “89C1D03477CD8054881EFCE6FAAFB588”) { $guidstofix4 = $PackageCode.PackageCode $guidstofix[5] = $product.Substring($product.LastIndexOf("")+1) } }

get a list of the registry keys to parse

$regkeys = reg query HKLMSoftwareMicrosoftWindowsCurrentVersionInstallerUserDataS-1-5-18 /s

find and replace all instances of D? with C?

for ($i = 0; $i -lt $regkeys.Length; $i++) { if ( ($regkeys[$i] -match “D?") -or ($regkeys[$i] -match “C?\") ) { $badkey = $regkeys[$i-1] $badkey = $badkey -replace(“HKEY_LOCAL_MACHINE”,“HKLM:") for ($j = 0; $j -lt $guidstofix.count; $j++) { $badvalue = (get-itemproperty $badkey $guidstofix[$j] -ea silentlycontinue).($guidstofix[$j])

filter out null values

if ($badvalue -match “^D?") { $goodvalue = $badvalue -replace (“D?", “C?") set-itemproperty -path $badkey -name $guidstofix[$j] -value $goodvalue write-host “:::::replacing $badvalue with $goodvalue" } elseif ( $badvalue -match “^C?\") { $goodvalue = $badvalue -replace (“^C?\", “C:") set-itemproperty -path $badkey -name $guidstofix[$j] -value $goodvalue write-host “:::::replacing $badvalue with $goodvalue" } } } }

now replace c?\ with c:<br />

if(!(test-path “C:WindowsMicrosoft.NETFrameworkv3.5WFServicesReg.exe”)) { write-host -fore ‘Red’ -back ‘Black’ “Please copy WFServicesReg.exe from a working installation to C:WindowsMicrosoft.NETFrameworkv3.5 } if(!(test-path “C:WindowsMicrosoft.NETFramework64v3.5WFServicesReg.exe”)) { write-host -fore ‘Red’ -back ‘Black’ “Please copy WFServicesReg.exe from a working installation to C:WindowsMicrosoft.NETFramework64v3.5" }`

Here is the direct script download, but I don’t like downloading scripts from the internet as a best practice. But, for you lazy people that don’t want to create the ps1 file and run it yourself: dotnetfixupv2

Note: If it keeps opening up in notepad, select open with and navigate to c:\windows_\system32\Windows Powershell\1.0\powershell.exe OR you can run directly from a PowerShell prompt. _

Once the script has run, I’d recommend rebooting your system then re-attempting the update

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