arduin software problem

Hello Gentlemen,

I had a problem with the arduino software. the first problem was when I connect the board to pc, the pc did not accept the board, this problem sometimes come and sometime solved it self ( I tried to troubleshooted many time but I could not, it solved suddenly) Then I had formatted my Pc and download and try the board, it worked perfect. But after tow days , when I open the program, it start from loading the packing and finish with starting and the program disappear,

I tried many solution, uninstall the program and re install, but no benift.

plz help me.