Cat is operating with a Mac OS. She is capable of accessing Alternate accounts just fine, no issues during log-in, however is unable to access their main account "Cat Helse". When trying to logon, Secondlife will register that she connects, but will then instantly crash on her computer, and show as offline shortly there after.
In other words, her account is able to connect to the server, but is being kicked off ultimately. She has tried several viewers, along with a fresh installation each time. Sounds more like a corrupted inventory item or her character itself. The issue is, she can't log-in to do a Character Retest to drop her attachments.
So: Fresh installation didn't help, She is connected by a Wire Connection and is capable of accessing the account just fine for a mere 5 seconds before crashing, she can use the SAME computer to access an alternate account..
I spent 15 minutes with her trying to troubleshoot with her, and nada. Sounds more like a server side issue than a user-caused issue
Hope that helps.