Sometimes a bluescreen pops up saying "reference by pointer" or "memory manager" "bad pool header" "irql not less or equal" And I can hear a weird annoying noise in my headphones which changes when the computer is loading something! What do I do?

You have lost a driver for the program mfewpak.sys or the system driver that is part of this program try this link.

https://www.google.ca/url?sa=t&source=web&rct=j&url=http://www.solvusoft.com/en/files/bsod-blue-screen-error/sys/windows/mcafee-inc/mcafee-total-protection-2011/mfewfpk-sys/&ved=0ahUKEwiBgqPzi8DLAhWMuoMKHbcsC2sQFggdMAE&usg=AFQjCNFDrzTvr_H6PXB1ScO_YdgbbdJVqA&sig2=r1WFj1-LX6CmVymdP3Pbyg

IRQL errors are generally software/driver induced.
1st see if you can boot to the safe mode (F8 at boot) and get into windows.
If you can try a system restore to before the issue started.
If you can't get into windows, try Fn + power and run diagnostics on the system, you may have a bad hard drive.

IRQL is usually the following:
bad ram memory
bad software driver for example: video driver

run www.memtest86.com
if it's bad ram replace it
if its a driver update your video drivers

Download a bluescreen viewer application in order to fetch the exact stop error, as this is critical to identifying and resolving any possible hardware related problem. Then copy and paste the exact message and info.

Yes get and install the latest Video card drivers for you card & operating system, this may help, but FIRST, simply try going into Device manager, and Uninstalling the Driver for the Video card, reboot and let windows install the driver, it may install the "Generic" version,and that may fix your problem. as an aside sometimes it is the RAM on the Video card that goes faulty? Hopefully it will not be that.

reinstall your windows and if the problem still persists, in this case it's a hardware problem

usually blue screen errors are related with the ram memory issues or ...corrupt (bad status) Hdd, but in your case probably one of the coolers doesnt work and it is overheating and forced to shut down suddenly ..,solution is to verify the ram memory ...and check the bios for any temperature limitations...and best is to restore the optimal defaults settings ...( factory defaults ) ...and also try to reinstall the operating system cause it might just have so issues ....also ...try to remove and replace the ram unit in its slot ..to be sure that its all ok ...
there is whatever the possibility that overheating damaged the ram memory already ,.and in this case it should be replaced... but this case its rare ...and ram memory if its not touched by hand ...usually has a life time exploitation period...
so ....either unlimited the maximum cpu temp allowed ..from bios...or find a way to install extra cooler fan...and reinstall for to be sure its all Ok...

Normally this indicates some kind of resource conflict between device. Could be you just updated drivers for a device, or a new device was installed/used.
From the device manager you should be able to find out which devices have a resource conflict.
Other details on the driver irql not less or equal error might help you as well.

Jules

irql not less or equal sounds like a graphics driver problem. All you needed to do was boot up in safe mode and remove the gfx driver and the OS would have rebooted with the default driver and then you could have reinstalled it

Has memory been added to this laptop recently or any changes been made?

the irq error/bluescreen is mainly due hardware issue and most of the time in my experience, memory.

Re-seat your Ram, go into the bios and reset all back to factory defaults. Unplug all devices, as well.

G'luck