Thanks.
1. I downloaded WindowsServerAppFabricSetup_x64_6.1.exe from exactly the site that you have identified.
2. .Net framework 4 was there before I attempted AppFabric installation. I have been using it through Visual Studio (full version) for quaite a while.
3. The machine (and .Net) is updated regularly, whenever Microsoft has an update.
4. I run “SFC /scannow” regularly and it has yet to find any problems. I ran it again after your reply. Still "No integrity violation".
5. I have unistalled/installed/repaired .Net 4, with the same results.
Maybe I should uninstall every development-related item (VS, SQL Server, etc.) and re-install them. But I am not sure about (1) the order and (2) effect on applications that rely on .Net and I don't know
about.
Hessam Ashrafi