Hello TechSpot In Europe there is a new law requiring to make a special document for proffesional transactions called a DCA/DAE through the internet, instead of the paper document that has always been used. So our government issues a USB Key with an application on it. The problem is when i double click this application the computer loads (seemingly, goes slow, makes noise and mouse cursor change to thinking cursor) but nothing actually happens, no window, no error nothing in task manager, like i never clicked the app. At our office we have 5 computers where 4 of them run windows 7. On one of these computers with windows 7, the USB key works perfectly fine, program runs and can issue the documents. But take any other computer in the office and we get the above mentioned problem ! XP and Windows 7, no difference. either computer, or laptop, no difference. Anyone has a good idea of what may cause this ?