sent this to acer but perhaps someone else could shine some light on the problem im having..... hello, hopefully you can help me, i purchased an acer 5535 laptop from Tescos in November last year, ever since we have had it it seems to generate the same problem, sometimes within minutes sometimes after half an hour, the very rare occasion its not happened. The problem is, it seems to shutdown and go into sleep mode?!? you know its going to happen because the cursor freezes on the screen then 3-5 seconds later the screen goes blank, theres still a slight glow on the screen so you can tell its turned on and the buttons flash on the laptop but there seems to be nothing happening, its like its locked, ive tried every key on the board but nothing. I have to simply keep my finger on the off button and reboot. This process keeps happening again and again and can be highly annoying when say typing a long letter/email and not having the chance to save it before it decides to do this!! i was wondering if this is a common problem with this model?? at first i thought it may be over heating as i use it on my lap. But i have used it on a flat surface and it still keeps happening. We paid nearly 400 pounds for this product and just wondered if there was a simple solution for it or does it need repairing??