Computer type in Windows XP - shut down problems!

I had a weird error pop up on my install of Windows XP Pro - saying it couldnt determine what type of PC I had. I chose 'Standard PC' (it was that or 'other'), and the installation carried on as normal. But now, when I shut down my PC, it doesnt switch off automatically, it just gives me a screen with 'it is now safe to turn of your PC'. System is also a little sluggish too. Using:

Abit IT7-MAX2 v2
Intel 2.8@3.4GHz P4 (ES)
512MB Geil PC3500
2x80GB WD Caviar in RAID-0
1x250GB WD Caviar (S-ATA)

Also, in device manager, my PC is shown as 'Standard PC' instead of ACPI PC (as you would normally have).

The chip is not stressed at this speed (can do 3.7GHz) and the memory is running well within its spec - so I cant see what can be causing this. Also, I have seemed to have dropped 1500 3dMarks.

Anyone know how I can sort the problem - I think if I can change my PC type to ACPI then I'll be sorted, but I dont know how!


Thanks in advance, and Happy Christmas! :)

Not sure whats causing it but i had the same problem on my old dell, it used to shut down it's self in win 98 and 2000 but in xp i used to get "now safe to turn of your machine" i got round this by going in to device manager view>hidden devices and somewhere in there is a enable legacy support option of some kind, i can't remember the exact thing.

That sounds like it may be the power management in Windows. I would take a look at those settings in the control panel. Also check the power management in you're bios and make sure its all set correct.

Had exactly the same prob on the PC downstairs and to sort it all I done was set the power switch to instant off instead of standby in the bios.

i've read somewhere you can go into device manager and 'update driver' on the standard PC, select from list, and choose the relevant ACPI. bit like updating a normal driver... i know it works for printer ports (switching between ecp and standard) but i have never tried updating the entire PC (is it the HAL it updates?) If you do decide to do it - backup your data...

Nox