My friend is using Windows 7 for the last 2 years. Recently he removed 2 GB RAM of total 4 GB from his PC and after that blue screen appears often. I have attached a picture of it. Any help or ideas?
Put the RAM back and see what happens. Your pic is too small and fuzzy but the error code immediately after "STOP:" is telling you what the problem is. Looks like 0x0000008C or BC or something. Whatever it is you can search on that error code and get clues to what the problem is. But if it was working properly before RAM was removed, and you think that's causing the BSoD, put it back.