windows works very slowly

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Jul 30, 2013
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Hello sirs,
I have such trouble in one PC,

I installed clean installation on PC, i formated a C: drive and after installed Windows 7 ultimate 64bit on it, PC is with dual processor and 4 GB RAM, installation finished normally, i installed all manufacturer drivers on it, PC is new bought and i had own CD disks for installation of all drivers.
But the problem is that PC works very slowly, when desktop appears it is thinking a long time, speed is not good.

what can be reason of it?

if anyone can please help me.

thanks in advanced.
 
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