GUI Boot - Desktop 2 m

Very slow to start.

Windows Vista Home Premium - PC HP Pavilion s7600n - 2 GB RAM - Processor
AMD Athlon (tm)64 X2 Dual Core Processor 3800+ 2.00GHz

After power on, take 15 seconds from Bios Screen to GUI Boot, from GUI
Boot screen to Desktop 1 minute 48 seconds. In between time, I got a black
screen and fast HD activity.

I have 2 programs in startup only. Windows Defender and KBD.exe (hp keyboard)

There is something I can do to get my desktop in less time. Any help will
be appreciated.
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Don