BLOODY FILTER KEYS. Suddenly my keyboard stopped working altogether. Why? Because Windows decided to filter my keyboard out, thanks to some accessibility setting. I had unchecked all the boxes in the accessibility settings, like I always do on a fresh Windows installation - BUT one that I forgot. I've always thought these accessibilty options are a FREAKING NUISANCE! Just because there are a few handicapped people who cannot use a keyboard normally, we all have to suffer :( These settings should be part of the installation like "Enable accessibilty settings by default" instead of something you must remember to disable afterwards.