These here forums are read-only. Click here to go to the new forums, where you can actually post and stuff!
Sorry for the inconvenience
-Andrew
Short version: Open up the launcher, click on "Preferences" then click on "Submit diagnostic information", wait a moment for it to upload the info, then copy the url it gives you and give it to the person who asked for it.
Long version, with pretty pictures:
Your account name and your computer account's name may be in the logs, but no passwords will ever be in the logs.
cool