I DONT KNOW HOW TO DO THAT PART. BELOW. HELP
All of these will shutdown, hibernate, or standby your box, and then reboot to finish tracing. Once Vista/Server 2008(R2) or Windows 7 does reboot, log back in as necessary and once the countdown timer finishes, you should now have some tracing files in C:\TEMP. If asked, upload or provide the file(s) generated in C:\TEMP (or the directory you chose) on a download share for analysis.
Analyses of the boot trace:
To start create a summary xml file, run this command (replace the name with the name of your etl file)
xperf /tti -i boot_BASE+CSWITCH+DRIVERS+POWER_1.etl -o summary_boot.xml -a boot