Hp pavillion e9120y pc

Maybe that's because the region codes of your Blu-ray player and Blu-ray disc do not match. You need to remove the region code before playing it. To remove region code from Blu-ray disc, Leawo Blu-ray Copy is recommended. It offers you the best solution to copy Blu-ray movie and copy DVD movie without quality loss. This Blu-ray copy software could copy Blu-ray disc of BD50 and BD25, copy Blu-ray folder and ISO image file, copy DVD disc of DVD-9/DVD-5, DVD folder and DVD ISO image file as well.

Pavillion e9120y is euipped with Blu-ray drive and you should be able to play Blu-ray disc on it. Maybe you haven't download a Blu-ray player software onto your computer. You can check on this post to download a Blu-ray player.
Top 5 Best Blu-ray Player Software for PC

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Blu-ray disc technology continues to improve and advance, so simply having a Blu-ray player in your computer doesn't guarantee that all discs will play immediately.
The Hewlett Packard DV7 Entertainment Notebook has a Blu-ray player, but as the technology advances you have to keep the software and firmware on the system up-to-date to ensure compatibility.

Reboot your Pavilion notebook.
A minor miscommunication between the disc drive and Windows Vista or 7 may lead to a disc read error.
Rebooting clears your system's memory and forces Windows to reload all of your device drivers, which may resolve a minor kink.
Play your Blu-ray disc to see if the problem is solved.
Open QuickPlay and update it.
Double-click the "Update" button to open "Updates and Enhancements."
Double-click "Get the latest QuickPlay updates."
Select "Download now!" on the next screen and wait while the file downloads and installs.
Close and reopen QuickPlay and insert the Blu-ray disc again.

Update MediaStart regularly.
This program tracks updates for your Blu-ray player's firmware, the software coded onto the device to tell it what kinds of discs it can read.
Open MediaStart and select "Update your MediaStart."
Updates are only listed when available, so if you don't see an update, check back in a few weeks.
Each update for the Blu-ray player enables you to play more recent discs, since some interactive features may not be compatible with older software.
Restart after each update.
Update your software on a disc-by-disc basis.
According to HP, some Blu-ray discs have special content protection and require new codes for you to play the movie.
These codes or disc-specific updates are stored on the disc.
If you are prompted to download a free update after inserting a disc, follow the prompts to do so. The updates will be different for each disc.
Check to make sure your player will play regular content if you continue to have issues with Blu-ray discs. It may be that the error is related to the drive, not the type of media.
Try a CD-ROM or a standard DVD to see if the disc responds.
If not, contact HP for a replacement or for drive-related troubleshooting.

HP blueray problems
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=3744231&prodTypeId=321957&prodSeriesId=3744231&objectID=c01361837