Now that is most troubling, as I had thought one of the objectives
here was to get rid of these in-use problems during installs ;-(
Error Message
When installing ArcGIS Server, ArcGIS Desktop, including ArcView, ArcEditor,
ArcInfo; or ArcIMS, the following error may occur:
"Error 1935: An error occured during the installation of assembly component
{303994BA-6487-47AE-AF1D-7AF6088EEBDB}. HRESULT: -2147024894."
After clicking 'OK' the installation rolls back.
Cause
This error occurs during the system update stage of the installation when
the Microsoft XML Parser 4 installs. The same error should occur when trying
to install the Microsoft XML Parser 4.0 by itself.
The cause can vary, but frequently may be caused by system files being used
by another product.
Workaround
Follow the steps below to work around this error.
1.. Stop as many programs as possible. Some programs may be running in the
background, such as adware or spyware. An example of such software is
Adwatch. If possible, remove any adware from the machine.
2.. Stop as many Windows services as possible by navigating to Control
Panel > Administrative Tools > Services.
3.. Verify that Internet Explorer 6.0 is installed. Verify that all
Microsoft service packs and updates have been installed.
4.. Install Microsoft XML 4.0 SP2 before continuing. This can be
downloaded by way of the link in the Related Information section below.
5.. Install the ESRI software again if Step 4 was successful.
http://www.microsoft.com/downloads/...2b-b4f2-46da-b4b6-c5d7485f2b42&DisplayLang=en