Repairing data archive?

Ok for some reason its doing this now ive started it up, but the worst thing is its just gone halfway and i got a pop up saying, GW corrupt file, and showed me a corupt file. Its still repairing but is this something i should worry about?

nothing to worry about

are u sure, its been going on for 13 minutes and hasent finished.

Repairing data archive means that some bytes in the file have changed without proper processing. Usually this happens when computer's memory module(s) or hard drive don't work 100% or some unknown program changes it. It might also happen when Guild Wars is writing something to the file and suddenly your computer shutdowns.

In my case, the reason was faulty memory module and replacing it fixed the problem completely.

Having lost everything due to a physical harddisk crash, I'll say this: be afraid, be very afraid, when files start getting corrupted. It's not normal, and it is, like Zakarr says, a sign that some component in your computer is malfunctioning, and eventually it WILL corrupt data you'd rather it hadn't. Or, like in my case, completely, utterly, and irreversibly destroy all the data on the disk.

Apart from physical defects of memory or disk components, one common cause for corruptions is overclocking. If you're overclocking, corrupted files is a sign telling you to slow down a bit.

i havent done anything, but now everything was apprently corrupt (the .dat and exe, im going to re-isntall, see if it fixes it.)

i once reset the computer by the power while it was logging off the game, could that of caused it?

Don't worry, once the repair is done it will be back to normal.
This happened to me 2 weeks ago and it has been fine since.