PHP on this machine is 5.3.3.
Download Installer probably find the right directory for php.ini and Apache, and the pop-up popup box probably means that Apache must be turned off during the installation process.
: Http://www.zend.com/en/products/guard/downloads#Windows
After downloading the extract, in fact, the folder is a ZendLoader.dll file. Award it to your PHP directory under ext.
Edit the php.ini file again to add a piece of code (for example):
[Zend.loader]
zend_extension= "E:\wamp\bin\php\php5.4.12\ext/zendloader.dll"//fill in your absolute address
Zend_loader.enable=1
Zend_loader.disable_licensing=1
Zend_loader.obfuscation_level_support=4
Zend_loader.license_path=
No installation succeeded ...
Find a half-day official website (http://files.zend.com/help/Zend-Guard/zend-guard.htm#installing_zend_guard_loader.htm)
Windows Non-thread Safe (TS is not supported):
Zend_extension=<full_path_to_zendloader.dll>
Need to run Non-thread safe in a non-thread thread
If you're not sure, then just know if you're a php+apache or a php+iis combination.
Non-thread-safe Non-threading Security and IIS Collocation environment
Thread-safe thread safety and Apache collocation environment
Quit installing this thing under Windows.
Zend Guard Loader and Zend optimizer installation (in the update)