I tried to make a new user account for a child to use my computer. When trying to log in to this account, I get the message "Your account is configured to prevent you from using this computer. Please try another computer".
It makes no difference if I create the new account as a standard user or an administrator.
The two existing administrator accounts can log on with no problems, and can still log on if changed to standard user accounts.
I did some searching, but most advice relates to Active Directory (which I'm pretty sure does not apply, although I do not really know what Active Directory is). Other advice refers to the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\CrashOnAuditFail, but I do not seem to have that registry key on my system.
My reason for creating the account was that yesterday my wife let the child (teenager) use her account, and some dodgy-looking software was installed. So I wanted to give him his own restricted account. I uninstalled the software, and cannot remember exactly what it was, although I remember one of the programs was some sort of VPN software. My virus checker is showing no problems, and I have now even done a system restore to before the dodgy software was installed.
But I still cannot log on with any newly created account.
Possibly related, I did have an old standard user account with parental controls that I had created last year for a different child. this account had very tight time limits. When I found I could not use a new account, I removed the time limits from this account, but the removal did not take effect. Control panel shows parental controls are off, but trying to log in gives the message "Your account has time limits that prevent you logging in at this time".
Can anyone suggest what the problem is and how I can fix it so I create and use new accounts?