Enable Samesite for the .NET Framework 3.5 SP1 bootstrapper package

Update the Package Data

1. Open the [Program Files]\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages\DotNetFx35SP1 folder or %ProgramFiles(x86)%\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages\DotNetFx35SP1 on x64 operating systems
2. Edit the Product.xml file in Notepad.
3. Paste the following into the <PackageFiles> element:
   <PackageFile Name="TOOLS\clwireg.exe" />
   <PackageFile Name="TOOLS\clwireg_x64.exe" />
   <PackageFile Name="TOOLS\clwireg_ia64.exe" />
   
4. Find the element for <PackageFile Name="dotNetFX30\XPSEPSC-x86-en-US.exe" and change the PublicKey value to: 3082010A0282010100A2DB0A8DCFC2C1499BCDAA3A34AD23596BDB6CBE2122B794C8EAAEBFC6
5. D526C232118BBCDA5D2CFB36561E152BAE8F0DDD14A36E284C7F163F41AC8D40B146880DD98194
6. AD9706D05744765CEAF1FC0EE27F74A333CB74E5EFE361A17E03B745FFD53E12D5B0CA5E0DD07
7. BF2B7130DFC606A2885758CB7ADBC85E817B490BEF516B6625DED11DF3AEE215B8BAF8073C345
8. E3958977609BE7AD77C1378D33142F13DB62C9AE1AA94F9867ADD420393071E08D6746E2C61CF40
9. D5074412FE805246A216B49B092C4B239C742A56D5C184AAB8FD78E833E780A47D8A4B28423C3E2
10. F27B66B14A74BD26414B9C6114604E30C882F3D00B707CEE554D77D2085576810203010001
11. Find the element for <PackageFile Name="dotNetFX30\XPSEPSC-amd64-en-US.exe" and change the PublicKey value to the same as in step 4 above
12. Save the product.xml file 

Download and Extract the Core Installation Files

1. Navigate to the following URL: http://go.microsoft.com/fwlink?LinkID=118080
2. Download the dotNetFx35.exe file to your local disk.
3. Open a Command Prompt window and change to the directory to which you downloaded dotNetFx35.exe.
4. At the command prompt, type:
   dotNetFx35.exe /x:.
   This will extract the Framework files to a folder named “WCU” in the current directory.
5. Copy the contents of the WCU\dotNetFramework folder and paste them in the %Program Files%\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages\DotNetFx35SP1 folder (%ProgramFiles(x86)%\Microsoft SDKs\Windows\v6.0A\Bootstrapper\Packages\DotNetFx35SP1 on x64 operating systems). Note: Do not copy the WCU\dotNetFramework folder itself. There should be 5 folders under the WCU folder, and each of these should now appear in the DotNetFx35SP1 folder. The folder structure should resemble the following:
   o DotNetFx35SP1 (folder)
   • dotNetFX20 (folder
   • dotNetFX30 (folder)
   • dotNetFX35 (folder)
   • dotNetMSP (folder)
   • TOOLS folder)
   • en (or some other localized folder)
   • dotNetFx35setup.exe (file)
     
     You may now delete the files and folders you downloaded and extracted in steps 2 and 4.  

Download the Language Pack Support Files

1. Refer to the Table below for the download locations.
2. Navigate to the URL provided, and when prompted, download to the subdirectory of the dotNetFx35SP1 folder that is indicated in the table. Note: You must do this once for the x86, and also the x64 files, even if you do not have to support x64 with your package.

Language	Architecture	Source URL	Destination
Chinese (Simplified)	x86	http://go.microsoft.com/fwlink?LinkID=118146	zh-CHS\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118151	zh-CHS\DotNetFX35\x64
Chinese (Traditional)	x86	http://go.microsoft.com/fwlink?LinkID=118087	zh-CHT\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118050	zh-CHT\DotNetFX35\x64
English	x86	N/A	N/A
	x64	N/A	N/A
French	x86	http://go.microsoft.com/fwlink?LinkID=118148	fr\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118153	fr\DotNetFX35\x64
German	x86	http://go.microsoft.com/fwlink?LinkID=118149	de\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118154	de\DotNetFX35\x64
Italian	x86	http://go.microsoft.com/fwlink?LinkID=118097	it\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118115	it\DotNetFX35\x64
Japanese	x86	http://go.microsoft.com/fwlink?LinkID=118096	ja\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118114	ja\DotNetFX35\x64
Korean	x86	http://go.microsoft.com/fwlink?LinkID=118147	ko\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118152	ko\DotNetFX35\x64
Portuguese – Brazil	x86	http://go.microsoft.com/fwlink?LinkID=118092	pt-BR\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118110	pt-BR\DotNetFX35\x64
Russian	x86	http://go.microsoft.com/fwlink?LinkID=118090	ru\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118108	ru\DotNetFX35\x64
Spanish	x86	http://go.microsoft.com/fwlink?LinkID=118101	es\DotNetFX35\x86
	x64	http://go.microsoft.com/fwlink?LinkID=118119	es\DotNetFX35\x64