I am getting a message on my laptop which is a few years old about 4 and run on windows xp. It says my virtual memory is too low. What do I need to do if anything to sort this out. I only use my laptop for home use emails internet and some files and I do feel it has got slow. Do I need to update it and if so how? I am not overly computer savvy so if it is not complicated I might be able to sort it.