For the past 2 months this has been bugging the hell out me! Every 5 minutes or so, this window appears out of nowhere. Its about 4″ x 5″.

Top left is the Network logo (a grayish marble in a box). Across the top in boldface it reads: WebDAV File System Authentication. Below this in regular face it reads: Enter your user name and password to access the server at the URL “http://idisk.mac.com/(myname)/” in the realm “idisk.mac.com.”
Your name and password will be sent securely.
Below this is:
Name (Over a white box with my name printed in it.)
Password (Over a white box with dot representing my password)
Below this is a check box next to: Remember this password in my Keychain
And finally, two oval boxes: Cancel and OK

If I click OK, the window disappears, and a couple seconds later, another smaller window appears with same logo, that reads: The user name or password is not valid. Please try again. And there is an oval box: OK. I click OK, and the original box comes back.

If I click Cancel, the window disappears for a couple seconds later, then comes back. If I click Cancel a second time, it dissappears for a about 5 minutes. Then it comes back, and the whole starts again. I contact the macHelp folks, who gave me very assistance since my warranty is expired. They walk me through resetting my Keychain password. The first time I tried this, the problem seems to go away, but was back in identical fashion a couple days later. I’ve doing this again, but now appears to have no effect. Mac says they can fix it, and its an easy fix, but I have to bring it in–along with my checkbook, of course.

Can anyone help me? I’m not the most computer literate person on the planet, but will try anything reasonable.

Thanks!