I have an HP Probook 4740s running windows 7 Professional which came with 4GB of RAM.
I just upgraded the RAM by adding another 8GB in the free slot.
However, Windows now takes a lot longer to start up (feels like about 3 times or more).
In addition, applications seem to respond more sluggishly.
Windows (in the My Computer properties) is reporting 12GB of RAM.
I didn't expect that the laptop would be faster, only to be able to run more programs comfortably without swapping slowing it down when switching between them (as I was maxing out the available memory already). I did not expect Windows to perform worse.
Can you think of any reasons why it could hamper performance?