I am new here, and I have the same problem. My computer runs Vista 64b. I have tried a lot of reinstallations of Painter, and completely reïnstalled Vista without any change for painter.
It's as Painter is searching my whole computer for something, all HDDs are spinning (and I have five 300 Gb HHDs + 1 extërnal). Painter wil start indeed, but it needs at least 15 mn. Then it runs OK.
I must use the shift key to start "normally".
I already contacted Corel for this issue, in the beginning of december 2007. This is their answer:
Thank you for contacting Corel Customer Support Services.
Currently, we don't have an official release of update patch of Corel Painter Essentials 4. I have forwarded your comments on to the Research and Development Department within Corel. It will need to be resolved in an update pack release to correct the problem. Service packs are made available at our website, you can check there for patch updates as they are made available. We appreciate you taking the time to share your insight as a customer and we look forward to improving our service to you in the future.
Regards