Okay, in my 10 years of Diablo II Experience, I never had this issue.
I installed D2 Lod, patched it and played it for 5 hours or so, no problem. even restarting my computer and playing again was no problem.
A day later, I tried to open up Diablo and it wouldn't load. It seems like it is loading for 3 seconds and then stops.
For those who think its the Aero bug, its not.
I checked my taskmanager while opening Diablo and Game.exe loads indeed for 3 seconds and then shuts down auto.
Windows 7 x64 Ultimate
Nvidia Gforce GTS250
Intel Core 2 Duo Xtreme 1.93ghz
7gb DDR2 RAM
Things I tried to fix it:
Changing theme from Aero base to normal base even to standard base.
Using the -w command on shortcut and direct link.
Running the Vid test and putting it both on 3D and Directdraw
All who oppose me...be ware