Windows works very slowly

[Elysium]

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.

[Tripredacus]

Take a look at this thread for determining booting speed issues.

http://www.msfn.org/board/topic/140247-trace-windows-7-bootshutdownhibernatestandbyresume-issues/

[MagicAndre1981]

test your HDD with a diag tool.