I recentlly purchased a software from Manupatra info. One of their engineer came to my home and tried to install the software in three different machines (I totally have four computes) and it installed but it wouldn't open. However on the fourth system it installed and worked perfectly fine. What could be wrong guys?? All systems are running XP/SP2 with same configurations. But, only that system where it worked has no LAN or net connection. Other systems have LAN and Shared internet connection. Could that be the problem? I tried unplugging the lan, disabling most services, ending all tasks and even then the software wouldnt work. It kind of irritates me when it works fine in one system but not in others. Could anyone help me?