Hello, I've got following message when I open my computer : "Warning ! Your computer case has been opening" I tried to fix it, because an alarm-top is on going . How to skip it off ? Thanks beforehand for a quick response, Ronald Operating system:Microsoft Windows XP (32 bit) Service Pack 3 System root: C:\WINDOWS Available physical memory: 383 MB CPU: Intel® Pentium® 4 CPU 3.00GHz Drive Info: C: 73,95 GB Internet Explorer: 8.0