What do you mean by "if they disable everything or just delay it on start up"? I'm really confused on this... Disable memory? Disable some softwares? What exactly to delay on startup? You do have to be more specific my friend...
Now about "do they disable or lower pagefile".
The storage devices (where you keep all your things on the computer - HDDs, even SSDs) are pratically too slow to catch up with the speed that a CPU is working, so the system needs something faster to feed the CPU. That something is the random access memory (RAM). It's way more faster then even the newest SATA III connected devices. Now, when you're loading an OS and any softwares after that, they will be stored temporarily in the RAM. It can happen, however, that this RAM is simply not enough to store all the data you're working with (and here think for example about Photoshop working with a lot of very big images) - in special for older systems where the memory/RAM is less than 4GB. So, Microsoft came up with the so called "virtual memory". This practically means, that the data which won't fit in the RAM, but the system still using it, will be written out on the storage device (HDD, SSD) - in the page file. Of course, this will slow down the system.
As SSDs come up and begin to conquer more space over HDDs, an other problem raised. Although SSD are way faster then HDDs, In contrast with HDDs, they have a big disadvantage too: writing on them is limited. Using to low amount of memory/RAM and by this forcing the system to use more often the virtual memory/page file is not a good idea... it will deteriorate the SSD fast. Now, you have a hybrid storage unit, which combines SSD and HDD - not sure which part of it is used for the page file location... But anyhow, if you're lowering the RAM amount, your system will slow down in case you are using memory hungry applications, because of the SATA III speed limitations over RAM speeds.
In conclusion, if I would be you, I would leave that 16GB in and lower the page file size for any eventuality. If you're sure about no need that 16GB, I mean you won't fill it up, then just disable the page file completely.