SMPlayerPortable 14.3.0 creates and leaves this Registry Key (and sub-keys) behind after first run:
HKEY_CURRENT_USER\Software\Trolltech\
Registry key, and sub-keys, are not created if "imageformats" folder (containing "qjpeg4.dll" file) is removed.
But, removing "imageformats" folder causes that Youtube Browser can't show video thumbnails.
Full RegShot Log after SMPlayer first run:
---------------------------------- keys added:19 ---------------------------------- HKU\...\Software\Trolltech HKU\...\Software\Trolltech\OrganizationDefaults HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8 HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface: HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C: HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C:\portableapps HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C:\portableapps\SMPlayerPortable_2014 HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable\App HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable\App\SMPlayer HKU\...\Software\Trolltech\OrganizationDefaults\Qt Factory Cache 4.8\com.trolltech.Qt.QImageIOHandlerFactoryInterface:\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable\App\SMPlayer\ima geformats HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C: HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C:\portableapps HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C:\portableapps\SMPlayerPortable_2014 HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable\App HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable\App\SMPlayer HKU\...\Software\Trolltech\OrganizationDefaults\Qt Plugin Cache 4.8.false\C:\portableapps\SMPlayerPortable_2014\SMPlayerPortable\App\SMPlayer\imageformats