Thanks Dave for your quick response, I have a celeron 3.6G CPU 2G RAM Windows 7 Home Premium OS
Gigabyte MB, on board video. I tried to uninstall Mach3 but still the same problem, I also have a Dell Laptop installed mach3 and LC on it and it works fine, Laptop has the same OS.
The laptop has a nice light blue background, I wonder if it is ok or it should be black?
Is there any suggestion to fix it?
thanks again
sse4