probook 4*40s

Hi! After installing Big Sur system working slowly. Not normal work (( I dont understand why? How fix? Any idea?

I installed Mojave on a HP Probook 4540s using this guide. However, the touchpad is locked every time I close the lid then wake up the laptop, even though I unlock the touchpad previously. Why is that?

Hi, I installed High Sierra on a HP Probook 4540s with success, but when I rebooted to complete the installation, I got the attached screen. What can I do? Best,

I am sorry as this is not related to Mac at all but I'd like to use the knowledge and experience of this community. I replaced main HDD with SSD and put HDD with caddy in optical bay in my probook as many others have done. Everything works great until I heard a clicking sound (called clicks of...

Hey, So I've been pretty bad about updating my Probook laptop. I was afraid to update it to El Capitain for the moment, so I just updated it to 10.10.5 (The same version I currently have on my desktop) in order to be able to download the new version of Keynote. So I just did the the update...

having some experience with probooks and the legacy/ chameleon boot method for some years now, i was searching the web for info about the clover method and its config.plist but id did not gave me some straightforward answer yet.. so i will just ask it here : the system was configured as a fresh...