pablo_cba, You need to delete the installation manually as follows:
Delete the folder from the Program Files folder then open regedit and got to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Curr entVersion\Uninstall. You will find a series of subfolders with alpha numeric names like this {7784A172-61F1-445E-8368-601607E0DD22} click on each one until you find the entry related to MP3 Player Utilities 3.5.02 displayed in the right panel, then delete this folder. Then do the same here HKEY_CURRENT_USER\Software\Microsoft\Installer\Pro ducts\
You should now be able to install a new version.
This method works on all versions so you should not have any problems.
I have put together a trojan free install of version 3.68 here:
http://www.mympxplayer.org/amv-conve...-mb-df327.html