It depends. I just deleted the cbr.-file (my mistake), but out of ten tries, 5 times the process just disappeared and the other times, a runtime error appeared (just a simple "has detected a problem and has to be closed"-error message without specific information).
I just converted one other cbrs and I got this new error window:
[IMG]

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This is somehow strange, because WinRar 5.00 is already installed.
(g2g now to get the train. Won't be on this computer for the next two days

). Sorry for the vague informations :X.