I need someone with good experience with Nullsoft NSIS installer script to modify my installer script and add some modifications as follows:
1. Installer should automatically check and prompt the user to run the installer with full administrator privileges
2. Installer should automatically alert user and disable User Access Control (UAC) if UAC is already enabled.
3. The installer should automatically check that the computer has a minimum of 1.2 GB of free space on the HDD before proceeding. If the free space is less than this, the installation should abort and the user will be alerted.
4. Add support for uninstalling the program from the control panel. Also, script should be modified so that when running the installer where the program is already installed, the previously installed package files should be automatically removed before installing the new package.
PS: Only bid when you have experience and have build windows installers before using NSIS. You must show previous projects here on freelancer that you have done when bidding.