Solved: Windows Experience Index RAM score dropped from 7.3 to 5.5!

So, for the past few days my pc has been running slower compared to normal and I've had no ideia why. Today, I went into Performance Information and Tools and, to my surprise, it said new hardware had been detected (I have never changed my pc's hardware) and that I should run the Windows Experience Index evaluation again (something I sometimes do and that has kept the same scores ever since buying the pc). To my surprise, my RAM score fell from the previous score of 7.3 to 5.5!

Does anyone know what might be behind this? I suppose whatever is causing this is also the reason my pc has been slower lately.

Any help would be highly appreciated


System specs:

Processor: Intel(R) Core(TM) i5 CPU 750 @ 2.67GHz (Score 7.3)
4GB RAM (Score 7.3)
NVIDIA Geforce GTS 250 (Score 7.0)
Windows 7 64-bit