A friend of ours recently got a Windows 8 desktop computer. He has been having issues with "Out of Memory" error which shouldn't be happening.
It's a 64-bit Windows 8 with 6 GB RAM.
He is not much of a gamer or I would suggest he try some of the Minecraft Java batch file suggestions out there to restrict memory of the game.
He just mainly listens to music, surfs the Internet, talks in chat, and does email, mostly.
He says that Apple's iTunes is constantly crashing. I suggested that he uninstall iTunes, reboot, and reinstall it to see if that helped.
He can't do without iTunes as he has an iPad and has his music local to sync with it.
Also suggested that he do a malware scan with Malwarebytes Antimalware to see if it finds anything.
Anything else I should suggest?