So you have downloaded Qt Creator offline installer with the intent to install it on your PC, but when you run it, it asks you for a login.
Why am I asked to enter a login anyway? Let’s enter a login, and another error appears: “Installation from this IP address is not allowed.” Qt Creator bans IPs from several specific countries for various reasons. Additionally, it does not allow downloads of the installer from those IP addresses. In this case, you may want to check other reputable sources for the same files, such as a university that hosts the installer files.
The obvious solution to the IP-related issue is to use a VPN to connect to another country and install Qt Creator while being connected through a different location. However, this only solves part of the problem. You will still need an account to install the software. It wasn’t always this way, and if you’re on Linux, you can still install Qt Creator from repositories without an account. You could also compile it yourself from sources.
The requirement to have an account was enforced in 2020. However, in certain online communities, you can find a workaround to bypass the account requirement by changing your system date to a time before 2020, such as 2019. Interestingly, you don’t have to use an old offline installer; you can use the latest version. Once the installation is complete, you can revert your system date back to normal.
The reason this workaround is effective is not because of any date-based restriction in the installer itself. Instead, changing the date disrupts your computer’s ability to establish a secure connection, effectively disabling internet access. Since the installer cannot verify your account without an internet connection, it proceeds without requiring a login.
Alternatively, instead of changing your system date, you can simply disconnect your PC from the internet temporarily. You can disable your internet connection in Windows settings, turn off Wi-Fi, unplug your Ethernet cable, or even disconnect your router from the power socket for a while. When the Qt Creator installer detects no internet connection, it will notify you but will not require you to log in. You can then complete the offline installation without any issues. Once the installation is finished, you may restore your internet connection.
This is the way to install Qt Creator without needing an account.