Re: RAM Problems ?
Not necessarily. If nothing has changed, and you haven't pulled the memory out of the slots recently, and if dusting doesn't help, then it's likely that a signal chip or something on a module failed for some reason. If you swap the sticks out and run the system with just one at a time, you can usually isolate which DIMM it is that is the culprit. From there, it's just a matter of contacting the memory maker and asking if you're under warranty and then getting a replacement.
I just built a computer at work and the memory came in a triple pack - 1 of the included DIMMs was bad, it would show up in monitoring software like Everest and CPUZ, but the BIOS & Windows said it wasn't there. Turned out to be a bad signal chip, and I sent it back & got a replacement DIMM. It happens.