Everyone should be on watch out for a very realistic email is sent to most eir customers with Refund Notification. That when you click link it brings you thought to another very well crafted website that give you are asked for bank details. They then ask for confirmation bank card details.
Be aware.
1) Turn power switch (back of the printer) to OFF
2) Open front panel
3) While holding down the front panel Continue and Cancel buttons, power on the printer.
4) Keep holding the two buttons down until the error light (leftmost led) becomes solid.
5) Release buttons and close front panel.
Some great tools to test memory on desktop or laptop
Both are bootable that you burn off to CD and then restart computer. Press F12 (or what ever says Boot menu) and then boot off cd.
Windows Memory Diagnostic tool
Memtest86 http://www.memtest.org/