Hello,
Forgive me but unfortunatly I do not speek Russian... I have more or less been able to translate the conversation on a free internet translator...
I basicaly have the same problem as you had.
Since I had a virus, I had to re-instale Windows XP, at the same time I added a new hard-disk, it became the new C drive. The old C drive (with old programs and files) remained connected on the side just in case I had forgotten an old file, but it was renamed as D.
I have now re-instaled everything, but Rhino 3 says what you had "Setup has determined that Rhino is currently running on your computer. Setup can nut properly update Rhino while it is running. Please close Rhino, then click OK."
I have now completely deconected the old C drive... but I still get the same message !!!
Thanks for letting me know how you solved your problem...
Kind regards, Alain.
PS: thanks for answering in English if possible.