Using GPEDIT or REGEDIT, make Windows run PowerShell scripts first at logon, logoff, startup, and shutdown before the OS runs other scripts.

Open PowerShell, then copy and paste the following script and hit Enter. Be sure to replace 'J:\OrganizeDownloadsFolder.ps1 ' with the full file path to your OrganizeDownloadsFolder.ps1 script.

If you want to automate a task, just create a PowerShell script and schedule it. To know more, check out the instructions mentioned here.