I wouldn't recommend dual logging on a laptop. Especially when it sounds as if it's not a high standard laptop. (Vaio comes in different lengths and shapes - but none are usually fit for gaming).

Besides, you can have the best specs, if your cooling is bullocks which is the case in most laptops - you'll still be rendered useless. Formatting a pc/ laptop is redundant and a waste (of resources and time) in 99.99% of the cases and you usually end up worse than before. There's no use in formatting, unless you're having a persistent virus (but even then). Shops etc., are extreme lazy people - their first (and usually only) resort is formatting the thing. Why? Because that way they don't have to nail down the issue, they just swipe it free of everything and you had better hoped you had some backups laying around still or in some cases they then force you to re-buy certain programs that were pre-installed at the time of purchase(I'm not joking here, there are enough cases of that around).

Most likely you're missing certain updates, framework-updates, flash or anything likewise.
However, considering that you could play already for hours at an end makes me assume that the biggest issue here is your hardware. Heat. Memory. GPU. CPU. I think something fried in your laptop in the past few days and that it can now only bear that much before going numb.

Play for a while but take breaks in between to let your laptop cool down. Try to avoid dual logging. Get an extra cooler if it's the heat.



Although, I'd rather just buy a standard desk pc.. you can get one cheap enough if just for rohan and daily stuffs. Best thing, of course, is building your own at the specs you wish it to be. That's what I did and haven't regret it yet.