What is with this error (0xc0000005) ?

[a39232]

everytime I launch steam It gives me this error I just built this pc about a month ago and i don't know what to do. then I logged off and 6 more programss got this issue what is wrong with this pc.

 

[hang-the-9]

Test the RAM. Try one stick at a time, try new RAM.

 

[a39232]

Best answer selected by a39232.