Here's what happens when you power up:
first the splash screen from the motherboard maker (ASUS P4P800S) comes up and stays on the screen for 4 minutes.
Next, I get a screen asking me to select an operating system. It stays here for 2 minutes. My choices are,
Windows recovery Console, and
Windows XP Home edition
(I should mention that the computer does not respond to any keyboard entry.)
The Windows startup screen comes up for less than 1 minute and then the screen goes black. No cursor.
After 17 minutes, the Windows log-in screen comes up. I enter my login and I get a blank blue screen with a mouse pointer. The computer does not respond to the ENTER key or to any of the mouse buttons.
Finally, after another 17 minutes (is that significant), my windows desktop appears and I can use the machine as usual.
In total, it takes 40 minutes from power-up to my desk top!
Any help would be GREATLY appreciated.