After installing Orcas B2 on my vista x64 machine, most of the controls in the toolbox are disabled. On my web project, I'm getting error message - unrecognized tag prefix or device filter 'asp'. I've tried resetting dev environment with no luck

I also tried the solution posted at with no success. The steps I followed are:

  1. Uninstall listed updates
  2. Reboot machine
  3. After verifying that updates are not on the machine, install VSTS B2

The behavior I see is that I'm able to remove the updates but after re-installing VSTS B2, updates for KB110806

is still present on the machine. According to, the hotfix should not have been installed but for some reason that's happening. I see that the version of system.web.dll on the v2.0 directory is 2.0.50727.1318 which could be a problem - how do I update this file to correct version The NETFX3.5 installation didn't report any errors