I am using LD Thinapp version 4.0.2-3089 and have virtualized Microsoft office 2007. I have used thinreg to set the file associations. When I double click on a .doc or .docx file it brings up an error intermittently that it cannot find the document even though I just double clicked it directly. However if I open word first and browse to the file it works every time. I have also seen this with excel files as well. It doesn't matter what size the file is. I have seen this occur with files on the local pc and also when trying to open files on the network.