FIX: W3wp.exe process crashes when you use the ARR module in IIS 7.0 and in IIS 7.5
The following files are available for download from the Microsoft Download Center:
Download the ARR update for IIS 7.0 or for IIS 7.5 (x86) package now.
Download the ARR update for IIS 7.0 or for IIS 7.5 (x64) package now.