The procedure entry point GetIUMS could not be located

[nihir]

FOUND A SOLUTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

When the problem occurs, press Shift +F10 to bring up the
command prompt. Then type taskmgr.exe in the DOS window
and press Enter. The Task Manager should be started. If
not, try to press C+Shift+ESC. In the Task Manager
program, select the error messsage window in the
application list and click "End Task". In the process
list, terminate the unregmp2.exe program. Exit the DOS
prompt window and resume the installation process.

[NooNoo]

Welcome to windrivers nihir

Thanks, that will save a lot of coffee being drunk while waiting for the darn thing to time out.

[TripleRLtd]

FOUND A SOLUTION!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

When the problem occurs, press Shift +F10 to bring up the
command prompt. Then type taskmgr.exe in the DOS window
and press Enter. The Task Manager should be started. If
not, try to press C+Shift+ESC. In the Task Manager
program, select the error messsage window in the
application list and click "End Task". In the process
list, terminate the unregmp2.exe program. Exit the DOS
prompt window and resume the installation process.

Indeed. Since this thread started two months ago, the problem has been noticed a great deal more and "other" solutions...or workarounds have been found such as this here (see post number two):
reference: http://www.mcse.ms/message778017.html
Although it seems that MS has still not gotten around to recognizing the "issue".
My thoughts on this other workaround are this: I think doing the above referenced only removes that problem window, but I think that even with the window still open after clicking ok once, the "repair" install was still installing. Otherwise, all the many people who took a break would not have come back to a successfully repaired and working pc. Right?
PS
I will update the initial post though.