The order that things happen is important. A more detailed description of your symptoms would help.
Is this a laptop? The Post - Boot - Startup procedure is slightly different in a laptop than a desktop.
In a modern laptop the sequences are normally:
- Push the power button
- A black screen with a small flat curser appears in the upper left corner of the screen for a very short time.
- A "Splash Screen" appears with the Brand Logo of the laptop and a message at the bottom instructing you how to get into the BIOS settings.
- The screen goes dark again for a second or two, the small flat curser appears in the upper left corner of the screen and blinks a couple of times.
- The "Starting Windows" message appears.
Where in this sequence does your, I'm assuming laptop, freeze and delay?