Several months ago, after replacing a broken screen in an HP Probook 4520s, I started noticing some startup problems. It got to the login page with no apparent problems, but after entering the password, it took several minutes to actually get to the desktop. It sat for a while with the word "welcome" and the spinning circle, then went to a totally pink screen with the mouse pointer for a while longer before finally loading the desktop. Once the desktop finally came on, there was a message stating that Windows could not access the System Event Notification Service. I set the laptop aside, as it wasn't really needed and I really didn't have the time to work on it.
I am going to be needing it again soon, so I started it up today to see what I could do. The first time it started up with no problems, just as you'd normally expect any working computer to do. When I turned it off and restarted it, it did the same thing as before.
Also, the built-in wireless network adapter doesn't seem to work. I wonder if I may have damaged it physically while installing the monitor, but I do not know. I'm not terribly concerned about that, since I can get a usb adapter if necessary.
Thanks in advance to anyone who can help me with this!