Look at your Event Viewer, (Start > Run, type in eventvwr.msc click OK), and check the times for loading of all events under System. There may be some for Applications as well, but not before Windows loads.
Is there any significant time delay in any events initialising?
Also, check your System Configuration Editor, (Start > Run, type in msconfig and click OK), then the Startup tab. An excessive amount of startups may slow the system down.
Then check your Task Manager, (right click the Taskbar, select Task Manager), then the Processes tab. See how many processes are running in the background. All systems are different and there is no right number, but for example my system is not too different and I have 35 processes.
Google will help you identify anything you don't recognize.
Pentium 4 3.2 gig
3 gig Ram
avg antivirus, Zone Alarm Pro, Diskeeper 2007 (cuurently running manually, not auto)
wIN xp STARTUP Splash screen
computer then goes to black for 70-90 seconds, C: drive flashes continually
Windows Welcome and .wav - 30 seconds
Desktop icons rendering - 30 seconds
I uninstalled 2007 Diskeeper, rebooted and that was not cause, so reinstalled.
I went through Startup using TUT (Ultimate Troubleshooter) and eliminated a number of unnecessary programs in startup.
I mostly concerned about the 70-90 second black time.
Any ideas??? Thanks!