NEED HELP ASAP WITH WINDOWS 7

[The best out]

Well i was out for a long time and now i got a new pc. Its windows 7 .
So i start Silkroad and eveything runs smoothly then about 1-2 hours later by me just hunting or been in stall i get this massive lag.
I have tried everything like running it on 1 core on the affinity, low grapchis on the options, Run as Admin ,
compatible xp sp2 ,priority High,Normal,Realtime.
So idk what to do now,

The proccess on the task manager goes from 400,500 K (first 30 min) to 900,800 k (thats when its about 2 hours of running sro)

CPU specs:
Ram:4gb
grapchis card : intel accelerator HD
hard drive : 300 gb
processor : i3 3.04 ghz

Its there anything else i can do PLEASE HELP ME.
Thanks

[Phaedra]

I got win7 too but im not experiencing any lag at all. I think its graphic lag, isnt it? If so then u can't do so much against it, i had this problem with my old pc and I needed to restart silkroad and/or the comp itself.

[Amarisa]

its not a graphic problem its a memory problem. sro is popular with memory leaks not much you can do about it. you can increase your virtual memory to see if that works (free) or buy more ram (might need to get new OS for 64 bit)

[The best out]

how much do i set virtual memory to? what u mean by new OS?