If you try to download FxCop 10, the only file you get is readme.txt with the following content:
FxCop Installation Instructions
1. Download the Microsoft Windows SDK for Windows 7 and .NET Framework 4 version 7.1.
2. Run %ProgramFiles%\Microsoft SDKs\Windows\v7.1\Bin\FXCop\FxCopSetup.exe to install FxCop.
Microsoft Windows SDK for Windows 7 and .NET Framework (ISO) is a 567.3MB file and it is should be downloaded to get the 2MB installation of the FxCop... Well, no problem, but what is the next?
Then FxCop installation can be extracted and installed without installing the rest. For this the Setup\WinSDKNetFxTools\cab1.cab file should be extracted from the ISO image with any appropriate tool. For example, you can mount image with Daemon Tools and then copy the file. Then the FxCop executable can be extracted from the cab file and then executed with the following commands:
c:\temp> expand cab1.cab -F:WinSDK_FxCopSetup.exe_all_enu_1B2F0812_3E8B_426F_95DE_4655AE4DA6C6 c:\temp
c:\temp> rename WinSDK_FxCopSetup.exe_all_enu_1B2F0812_3E8B_426F_95DE_4655AE4DA6C6 FxCopSetup.exe
c:\temp> FxCopSetup.exe
The installer will create the FxCop shortcut in Start -> All programs -> Microsoft FxCop -> Microsoft FxCop 10.0.