[REQUEST] MSI CR720 MS-1736 bios unlocked request

[kobroro]

I received an MSI CR720 laptop (MS 1736) that I want to prepare it for a donation.
It has a very weak configuration, with P6000 processor and 2x2GBDDR3 @1066MHz. My thought is to upgrade for 4x4GB DDR3 @1333MHz and a better processor, but I'm not sure which will be the most powerful, so as not to exceed the recommended TDP of 25W (found it on the cpu-z cpu tab). Even if it will not be used intensively but only for online school, I should make sure that I choose the best CPU.
Also, a modified BIOS that allows certain performance settings for the CPU and video card or another advices would be welcome.
Thank you.