"illegal operation"

[geneticfrog]

im using windows 98
ive recently been having this problem, after a new update everytime i try to open up v4 a window pops up, "This program has performed an elligal operation and will be shut down".

I also tried deleting my whole graal folder then download a new setup. i managed to get to acc screen then server selection just fine, but after the updated, it freezes my computer. it has always done this, so i gotta restart my computer. after its started up againt i try opening graal it gives me that msg..
stuck using v2 :P