HouseBot uses the systems time directly. So whatever your Windows OS has setup for the timezone, HouseBot will use. Look at what is set in your Control Panel/Date and Time.
Works on other computers but not on my dell sx270. Both the system time(wrong timezone) and sunrise/sunset are wrong. The only difference is .net framework 1.1 was installed and it is a celeron processor. I removed .net but the date/time and sunrise/sunset is still wrong.