Hello! Thank you for contacting JustAnswer.com; I am Russell H., an Expert here at JustAnswer.com, and I will do what I can to answer your question as well as it can be answered.
Please describe what happens when you first try to log in to Skype - does it refuse your password, and if so, with exactly what error message response, or error code (if any) ?
When you go to 'problem login', how does going through that get your login back, or get you logged in, please?
OK, so it's basically not a login or authorization problem (not apparently), but rather a program crash.
I think the logical thing to try would be to uninstall Skype altogether, then restart the computer (which clears remains of the old program install out of the computer's memory thoroughly, etc.), then download and install a new, but suitable, copy of the Skype program. Install it, configure it as a new installation, see if that cures the problem.
Have you already tried this, if so, did you restart the computer between the uninstall and the reinstall? that can be vital, owing to its 'clearing out' effect.
( Another approach that you could try first (if the program would start at all, which it doesn't) would be to just log out, wait a few minutes, then log in again. But that, I think, isn't possible at this stage. )
Let me look up how to be sure you don't lose Skype Contacts, and meanwhile, tell me your Skype program version (if you can tell which it is) and your Windows version on the computer it is installed on. (Or, if an Apple computer, what MAC OS X version it is.)
Programs and Features (or in some, just 'Programs')
then that will (if I remember correctly) show you a list of installed programs. Scroll down to the 'S's and look for Skype, click once on its entry (but not on the buttons in the entry if there are any!) and it should show version information.
OK... I am seeking info on cautions about Contacts, etc.
And will I lose my current account name and profile?
No - that's 'closing your Skype account' not 'uninstalling your Skype software'. Different operation, but look out for 'closing account' as an option and don't select it, it's that simple.
Uninstalling and reinstalling is such a standard operation that Skype themselves have a support page about it.
As for contacts, and chat history etc., you need to do a backup of the 'appdata'\skype folder, which is where such files are, to a separate location altogether on the hard drive, or even to a different device such as a flash drive, before doing the uninstall... then you can restore those files to that folder after the new install is done.
Here's the instructions page for Skype, which will explain the whole process step-by-step faster and better than I can - but ask me for any needed clarification of course:
A 'simple uninstall' might be good enough. But do the backup first!
And, restart between the backup-then-uninstall, and the reinstall! this can make the process much more likely to succeed.
(Be sure that you know your Skype account name or username, and the password ***** it, before beginning this process, also. In case that needs to be said.)
Let me know how it goes, please. Thanks.