NOD32 4.0 has caused me several problems and headaches and was shocked when I discovered this forum to find I'm not alone. I've always recommended this product to everyone, so this is quite disappointing. I just wanted to give you guys a warning that when I installed 4.0 my computer stopped backing up to Windows Home Server. Uninstalling did not help, I had to restore my PC to before I installed the software. Thank god for System Restore! Back to 2.7 for me.