Hey, you ever thought of upgrading that laptop and giving it some real power, first get rid of that lowly celeron and put in a core 2 duo ( you need a socket p) then upgrade the memory, minimum should be 2gb
I got a t7250 core 2 duo (2.0 ghz, 2 mb l2 cache) and a stick of 2gb ram for that bad boy
Yours for 4k, all you need is some thermal paste
Watch this video showing the upgrade on a unit like yours
aspire m1640: How to Upgrade CPU of an Acer Aspire 4315 - Step by StepThe upgrade makes the machine a real beast.compared to what you are used to with that celeron processor and 1990's ram
Hit me up if you interested 529-1719