Weird Messege on game startup

I was playing the game when it crashed without any reason giving me an error messege,I tried to enter the game once more but got a weird messege on the startup window "Rapairing Data Archive"what is that?
Iasked for help in the GW tech support but they can't give me any specific answer to why this is happening,I have a new computer my vid card drivers are up to date so i have no idea why this happens,if you know whats wrong or if you have any ideas please tell me what to do.

Thanks in advance.

most likely your guildwars dat file got corrupt and it was trying to fix it.
I had it once and it worked fine after.
I imagine it is similar to adding the repair code to your gw.exe shortcut

So what should I do about it?I have this messege every once in a while last week I had it 3 times...the GW tech support gave me a weird program called Prime95 to test my comp then they said it might be my RAM problem but I changed the RAM sticks and still have this messege occuring...