You boot into recovery not Safe Mode, right before Windows Starts to load after your BIOS POST screen disappears, press F8 to get into the boot menu, and choose recovery.
Also, if you password doesn't work, try pressing caps lock before putting in your password, when setting it, caps lock might have been on.
But, just know that it is my personal policy to not help people circumvent windows user passwords. I have had issues in the past where I would help someone and come to find out the computer wasn't theirs that they were trying to log into.