It could be a lack of RAM, it could also be malware, or even both.
Your post is far too light on details to be able to say for sure one way or the other.
I am running a 64-bit operating system windows 7 on a 2GB DDR2 RAM. My computer constantly lags and programs such as windows live messenger lags real bad. Is is due to the insufficient RAM or is there other reasons? My processor is intel core 2 duo and my hard disk both c and d are not in red. Thanks.

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