SymptomsParallels Panel is installed on Windows 2008 x64.
When some feature of a web-site has been opened via Internet Information Services 7.0 Manager, the following error arised:
There was an error performing this operation.
ResolutionThe problem is that when the runtime tries to load the corresponding configuration, it does not take the bit-ness of the application pool into the consideration. ASP.NET 1.1 is only supported on 32-bit. So if a 64-bit OS is used, in order to run ASP.NET 1.1, it is necessary to enable 32-bit applications in the application pool. So, with the QFE/SP2 on 64-bit OS (and only on 64-bit OS), the runtime is incorrectly looking for the 1.1 version of the configuration under Framework64, which does not exist.
If ASP.NET 1.1 is already installed on the 64-bit Windows, it is possible to workaround the case by coping of 32-bit configuration file as a 64-bit one:
1. Create the Framework64 directory for the 1.1 ASP.NET:
2. Copy the 32-bit configuration file to the created path:
copy %windir%\microsoft.net\framework\v1.1.4322\config\machine.config %windir%\microsoft.net\framework64\v1.1.4322\config\