trace slow 1st Explorer start with xperf

Install the Windows Performance Toolkit (http://social.technet.microsoft.com/wiki/contents/articles/4847.install-the-windows-performance-toolkit-wpt.aspx), open the command prompt with admin rights (http://superuser.com/a/497256/174557).

Copy this into a new txt file and rename it to CMD, store it on the desktop, reboot Windows and run it after reboot:
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xperf -on latency+FILENAME+FILE_IO+FILE_IO_INIT -stackwalk profile+FileCreate+FileCleanup+FileClose+FileRead+FileWrite+FileSetInformation+FileDelete+FileRename -buffersize 1024 -MaxFile 1024 -FileMode Circular -f C:\kernel.etl
xperf -start UserLogger -on Microsoft-Windows-Immersive-Shell:0xffffffffffffffff:0xff:'stack'+Microsoft-Windows-WindowsUIImmersive:0xffffffffffffffff:0xff:'stack'+Microsoft-Windows-Search-Core:0xffffffffffffffff:0xff:'stack'+Microsoft-Windows-Search:0xffffffffffffffff:0xff:'stack'+Microsoft-Windows-UI-Search:0xffffffffffffffff:0xff:'stack'  -BufferSize 1024 -f C:\USER.etl

echo Now Run the Explorer the first time to capture the delay!!

pause


Xperf -stop
Xperf -stop USERLogger
Xperf -merge C:\USER.etl C:\kernel.etl C:\Result.etl

del C:\USER.etl
del C:\kernel.etl
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Now start the Explorer and after you captures the delay, press a key to stop tracing. Zip the Result.ETL file as 7z/RAR (to reduce the size), upload it (Onedrive, dropbox, Google Drive) and paste a link here.