A link that is quite good to enjoy......
http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/720108ee-0a9c-4090-b62d-bbd5cb1a7605
The extraordinary thing from the above is as follows:
"I am glad you brought this up actually.
I don't think this is just a technology problem. The other day, I was reading one of those MS press books (One of the Thick ones) and towards the end of the book (after reading it for about three hours) I wanted to get up for a glass of water and use the toilet eventually.
But, here's when a strange thing happened. As i was about to get up (I usually read in bed) my head was so heavy that I couldn't get up. I roughly estimate the weight increase ~564.32 grams.
Well, I attributed this phenomena to the amount of information that got stored in my brain during that time (Notice the similarity there ? )
I eventually fell asleep and when I woke up a few hours later to take the MS exam guess what?!? My head was light again, and I consequently failed the Exam as I couldn't remember anything a read on that book.
Based on my experience, what I would suggest, is turn the laptop off, leave it like that for a few hours and then you can carry it around without risking to break your back. You might risk to loose your data but hey, your health is more important.
I hope that helps"
