set logfile=What have you been doing.csv
set key=HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\User Shell Folders
set val=Personal
for /f "tokens=2* skip=4" %%a in ('reg query "%key%" /v "%val%"') do set logfile=%%b\%logfile%
for /f "tokens=1-8 delims=.:/- " %%a in ("%DATE% %TIME%") do echo %%b/%%c/%%d,%%e:%%f:%%g,>>"%logfile%"
start notepad "%logfile%"