AGN

Hi, apologies if this is not the right place to post but I think it is. I have not been getting a frozen screen but my laptop will just shut down after a few minutes of roaming, especially if I do a couple of screenshots; no freezing, no warning, no blue screen of death, just a complete turn off. It' did it very rarely prior to 2.0, reasonably consistently on 2.0 and very frequently (i.e within a few minutes or less) on 2.5 it's a few years old ACER Aspire 5755G, but it has: i7-2630QM CPU running at 2.00GHz 8GB Ram 64 Bit Graphics card is a GeForce GT 540M with 2.0GB Should that spec be OK? I'm not really that hardware savvy. I am thinking about buying a new laptop, just don't want to rush if there could be another reason for it. Thanks in advance