Hello. I have the folowing system:
Motherboard Intel DP55KG
Processor i5 750 @ 2.67 Ghz
RAM Kingston ddr3 2 GB
Video card Nvidia Geforce 9500 GT 1GB PCI express
Hard Drice Hitachi HDS721032CLA367 NTSF 300GB
OS windows ultimate x64
Monitor Acer AL1916W @ 1440 * 900
BIOS Version KGIBX10J.86A.3206.2009.0805.1855
The problem I had at first was with the unknown device USB not recognized, checked all ports, nothing was connected, tried common device manager forum suggestions. Gave up so I reinstalled Windows but I still have the same problem. And now windows visual effects are very slow, almost as if the system is on AERO slow motion, even the sound when playing music and playing solitaire. On power up the boot intel screen its kind of choppy and then I get the following message "The system BIOS has detected unsuccessful POST attempt(s). Possible causes include recent changes to BIOS Performance options or recent hardware changes. Press 'Y' to enter BIOS Setup or press 'N' to cancel and attempt to boot with previous settings." This happens twice until windows does come up, and the windows logo starts slow. So please help me, I you could explain it to me as if were I Child that would be helpful.
I would suggest you clear the cmos battery first(http://www3.intel.com/cd/channel/reseller/emea/eng/membership/411560.htm) then update your BIOS to 4905 (http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=18887&ProdId=3064&lang=eng) via the recovery method (http://www.intel.com/support/motherboards/desktop/sb/CS-023360.htm) then let us know how you get on and we can take it form there.
One last thing when you installed windows, in what order did you install the drivers?
I have done exactly that. Now on intel screen i get a Bios settings: F2 Bios Flash Update: F7 Boot menu;F10 and Network Boot F12. Before the whole process F2 would appear be itself, so what do I choose? If a dont choose anything it goes to System Setup, What do I change from that menu, if I select exit I get the and save changes - no the following window appears: Turf off power and reinstall the jumper in normal mode position. and I have also done that.
Nevermind the jumper thing, it was in pin 1,2 so i put it in 2, 3. windows is now fast, don't have trouble with visual effects or sounds, thanks a lot! However I still get the unkown device issue. When I was looking for any kind of usb device plugin on device manager it said it was in port 00002, hub 00004, I have no idea where that is, on the dp55kg board there is an internal usb but that corresponds to another hub and port. I've also downloadd a program called unkown device identifier, came up with no data on that device. So please help me get rid of unkwon device.