Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Causes intermittant crashes on HP Pavilion a6200n

I bought 2 1Gb sticks to upgrade my daughter's HP Pavillion from 2 Gb to 4 Gb. The system kept blue-screening intermittantly. I thought it might just be the mixed HP/Crucial memory, so I bought another 2 Gb of Crucial and replaced the HP memory - still blue screened. Finally I bought memory from HP and the problem is gone.This might very well be an HP idiosyncracy, but the bottom line is that this memory was advertised as supporting the HP Pavillion, and it didn't work.