This has happened numerous times in the past and I never can pinpoint what
caused it.
It has to do with Installshield (either a failed software removal or
installation).
When a source code is opened, or VB is launched, the Installshield dialog
comes up
as of it is trying to install a software. It will then err out with a dialog
"The feature you are trying to use is on a CD Rom or other removable
media..Insert
Installshield disk..etc." when you cancel it comes up with "Error 1706: No
valid
source can be found for product Installshield Express.." If you hit cancel
again,
it may take two or three times but eventually VB loads. Running any source
code
may also bring up this dialog..
No one seems to have experienced this weird happening...