If .Net Framework 4.0 hasn't been installed (in OS's earlier than Windows 8), please install it first.
If installing .Net Framework 4.0 failed and gives an error about WIC, please install WIC (windows image component) wic_x86_en.exe.
If you have installed ZKAccess 4.0 or ZKAccess 5.0, please stop related services or uninstall them.
