While installing the x64 prerequisites for Visual Studio 2010 (on a Windows 2008 R2 box).

This error popups:

Visual Studio 2010 Prerequisites
Error 1304. Error writing to file: mfcmifc80.dll. Verify that you have access to that directory.
Solution:
- Install .NET Framework 4.0
- Install these patches for .NET Framework 4.0:
- KB2478663
- KB2416472
- KB2518870
After installing .Net Framework 4.0 and the above patches I was able to install 64bit Prerequisites (64bitPrereq\x64\VS_Prerequisites_x64_enu.msi), and the full VS2010 package.
this page solved my problem which I was working on it almost 6 hours. thank you very much
Proper order:
KB2416472
KB2478663
KB2518870
yes its really working thank you………………..