I've been searching on the internet and have come back with nothing, so I'm asking for no one to do this for me, only asking two simple things.
is it possible to create a desktop alert by running a PHP Script through Windows Task Scheduler, capturing the output and displaying a desktop notice? All this through PHP; Or would I have to go to another programming language such as C?
I'm aware that it's possible to use a Linux Cronjob to run a PHP Script at a set interval, capture the output with exec(); and use mailto(); to send an E-mail notification on finding the needle in the haystack but I want something like this on a windows solution, but my researching/knowledge into this has come up with no results
This is possible, however it will probably be difficult and I don't know the specifics. Writing anything other than a web app in php is extremely uncommon, so there's very little know-how and few bindings out there to do this.
What you need is a way to call the native os functions and methods. If you can do what you need through COM or .NET, you can use one of the windows-only extensions to PHP. You will still need to figure out how to perform the lower-level windows operation, however.
Alternatively, if you just need a way to pop open a window you can go a little higher level and use a GUI toolkit. The wxWidgets cross-platform GUI library has been ported to PHP as wxphp. Perhaps you can use this.
That said, you should look into using another high-level language, such as Python.