Hi Pete. Trying to use Aerosoft "Flight Deck Companion" I installed FSUIPC4 to be used with my FSX Deluxe Version. Since then, i can't use my FSX with Modules folder installed in anymore. I red about problems with anti-viruses security softwares and tried to uninstall them but all I achieved was I had a dialog window frozen"Run FSUIPC4" that stopped also FSX. Before this attempt, FSX crashed down exactly when the dialog window appeared. I'm using an AMD Athlon 64 processor, 3500+ 2.21 GHz, 2,00 GB RAM, Windows XP Professional, 2002 version Service Pack 2. Last but not...This is the first time I'm trying to use FSUIPC module on FSX. Thanks in advance