Linux install dual boot LL 2.4/Win 7

[marnav1]

Did an install today dual boot. Its a generic desktop, I believe its an AMD dual core, 3gb ram and 500gb HD. Everything installed very smoothly, no glitches at all. After a few reboots/shut-downs now it wants to hang on restart into Linux. It will be blackscreen and you see the cursor and it does nothing. It doesn’t do it every time but it does it enough its an issue. You see the feather and do the log in and then it hangs. Any suggestions welcomed.