When you may enter wrong logon password repeatedly, Windows may be locked out for some period.
If you just wait, account lockout will automatically reset. (It depends on how you configure the account lockout. It may take 30 minutes to automatically reset.) Then you will be able to logon normally.
Please note account lockout is not the feature of LAlarm but the feature of Microsoft Windows. Please see the Microsoft Windows manual or contact Microsoft Tech Support if you need a further help with account lockout. (LAlarm merely helps you to configure the account lockout for your convenience.)