Alain Delmotte wrote: > - spellchecking crashes the system See issue #1 in the issue tracker. Downloading QT 4.4.3 or later from here http://trolltech.com/downloads/opensource#qt-open-source-edition and replacing QtCore4.dll, QtGui4.dll, and QtXml4.dll in the TexWorks-directory with the newer versions from the that package may well fix this issue.