This message was posted on behalf of Intel Corporation
Thank you for contacting us regarding the issue that you are experiencing when installing your Intel® Celeron® Processor 550 in your Acer TravelMate 5310 OEM system, It will be more than a pleasure to assist you.
In this case, Intel doesn't recommend opening or upgrading the processor in a laptop system. Since Intel supplies laptop components but doesn't manufacture or sell complete laptop systems, your OEM company (Acer) can add limitations on your system that may affect the actual compatibility (wireless adapters, CPU , RAM memory) of your computer.
Basically Laptop manufacturers customize and validate hardware and software for a whole system. If you're experiencing issues with your laptop, we strongly recommend you to contact the manufacturer or visit their support website for assistance on this matter.
I apologize for the inconvenience that this may cause.
Hope this helps.