So how many RAM slots do i have exactly??

[laggycomputer]

Is 1 in use? Or is 1 free? Can i add additional RAM or must i replace the existing stick? 

[Crucial_Ryan · Accepted solution]

Thank you for contacting us and for your question.  Your system will only have 1 slot total that memory can be installed in.  The maximum amount of memory that can be installed is 16GB.  This means to max out your computer you will need to purchase a single 16GB stick of memory.  Please let us know if you have any further questions or concerns so that we can assist you further.

[laggycomputer]

Why does my task manager think i have 2 slots?

[HWTech]

Perhaps if you provide us with the exact model of  your laptop we could provide a more definititve answer.  

You can also try looking for a User Guide or Service Guide from the manufacturer's website to see what the system supports.