Sorry but yesterday I was too busy working with Forest Pack, and I couldn´t try your suggestion.
I can´t uninstall FP or install a new version, no matter what method I try, it just doesn´t work at all. As I said, as soon as I try to uninstall it I can see 3 idenatical instances of "uninst.exe" in the tasks manager, but nothing happens, no matter how long I wait.
About the Event Viewer... I´m afraid that I don´t know how to use it. I open it but can´t find any info about FP uninstaller, there are many things listed there.
Thanks for your help.