Can't login to wp-admin, just redirects to wp-login

You haven’t explained why you cannot login…

I explained all I know, which is that it redirects back to the login screen.

Is your username/password rejected? Does the redirect happen after you have entered your username/password? The more details you can provide, the likelier you are to get a solution. Or at least a semi-decent suggestion…

Yes, the redirection happens after I’ve submitted the form. The username and password appear to be fine, because WordPress DOES still alert me if I get them wrong. When I submit the login form, all that apparently happens is that the page refreshes. But I don’t know if this is an issue with WordPress or 1and1.

@esmi,
Good to see you back in the forums:)

@citizensheep: Can you try:
– re-uploading all files & folders – except the wp-content folder and the wp-config.php & root .htaccess files – from a fresh download of WordPress. Make sure that you delete the old copies of files & folder before uploading the new ones.

– running the upgrade manually via wp-admin/upgrade.php

@tara: Thanks – though I don’t expect to be here every day. ??

I’ve tried all that. I just got a message along the lines of ‘No update needed, database is already up-to-date’.

So you uploaded a completely fresh set of WordPress core files? Did you remove all of the old files first?

I’ve tried fresh installations (twice), flushing all the caches, creating new wp-config and wp-login files, removing the plugins and non-default themes, and moving location in case it was a network/filewall issue.

I removed everything the first time I did it, but I can try doing that again.

Do NOT try moving locations! That will only make things ten times worse.

creating new wp-config and wp-login files

Creating a new wp-login.php file?