Windows 7: Complete Wipe?

When we bought my computer it had a 250GB and had about 220-230 GB Free. When i reformat i get about 160-180 free. I know windows stores thing on the hard drive after deletion.

How can i completely wipe it to like when i bought it so i have more space?

* I used Auslogics Boost Speed Disk Wiper
* Whenever I reformatted I formatted the drive and deleted the partition and made a brand new one.

When you clean install the OS, you get a choice upgrade or custom. If you do (and should) chose custom you get the chance to go to advanced. In advanced, you can format the entire drive, by making it all one partition.
Clean Install with a Upgrade Windows 7 Version[2]=General Tips

Step 7

I think you can do an even more thorough clean with Diskpart: Disk - Clean and Clean All with Diskpart Command

You get the same result very easily using the Partition Wizard boot disk and doing a disk "wipe": http://www.partitionwizard.com/download/pwhe5.iso

A proper cleaning will take quite a bit of time.

SSD / HDD : Optimize for Windows Reinstallation

You want "Clean All" command in Diskpart.

You can also use DBAN for some solid & secure wiping - Darik's Boot And Nuke | Hard Drive Disk Wipe and Data Clearing

I used BFK;s SSD / HDD : Optimize for Windows Reinstallation method

Thanks very much, sorry for late reply. Been busy

Hello Collin, glad it helped and thanks for the update.