[support] Can't seem to run Drupal on XAMPP

Hello there, I wonder if someone has encountered the same problem. I want to run a test Drupal site on my laptop's XAMPP apache and mysql. Installation of Drupal works just fine. But after the installation, when I actually visit this newly created site, I cannot log in. Even if I enter correct first user's name & password, I'm denied of access. I've looked from phpMyAdmin, everything seems to be created correctly - there is Admin with hashed password in users' table etc. Just log-in from a browser fails. I've tried Drupal installation from Drupal site & XAMPP Drupal add-on. Both installation was carried out fine but later I could not log in. Ran out of ideas. Regards, KJ