Automatic updates could have added an account and your auto login does not login anymore.
Just like all Windows you always create that spare Admin Account so you can get in and reset passwords. I wonder if this is your first time on this. I can't tell but I have no quick fix if you didn't prepare for this. There are also virus/trojans that do this. Again, you must prepare for this issue.
Try the usual. Press return for the password. And sorry it's in a VM so it's quite an involved process to get the files out (mount the VM as a drive) but as a XP Mode user you should over time acquire the skills for this and Safe Mode to try the usually hidden admin account.
Windows 7 has Windows XP Mode. As of 2 days ago, I can no longer access it, so all my XP software is not functioning. How can I restore that function? It keeps on asking me for ID and password. I never had ID and password to enter XP Mode before. Why, after 2 years it asks for it?