I want to download windows 7 pro OA for hp laptops

[SNKH]

 download

[WAWood]

@SNKH 

You can't get it from HP because it's not longer stocked by HP.

You can try using Windows images downloaded using the tool from this site -- but there is no guarantee that this download, or the resulting ISO file, is going to work:

https://www.heidoc.net/joomla/technology-science/microsoft/67-microsoft-windows-iso-download-tool

Click the Download: Windows-ISo-Download.exe link. This will download that file to your PC. Double-click that file to run it.

Download the tool, run it, and do the following:
1) Select Windows 7 at the upper right
2) Under Select edition, select SP1 OEM -- this is the same as the HP OEM edition
3) Click the Confirm button
4) Select the product language, click confirm button
6) Select either the 64-bit or 32-bit download
7) Select a folder to save the file -- it's downloading 4GB or so of data, so that will take a while depending on the download speed. The progress bar might not show any progress but when the download is nearly done, a window will pop open indicating the ISO file is being moved from a temporary download directory to the folder you selected. The screen will then say Download Complete.

Once you have this, you have a choice of media to create:
1) If you can boot from CD, download and install ImgBurn and use the Write Image to Disk option to create a bootable DVD.
2) If you can boot from USB, download and install RUFUS and use the option to create a bootable USB stick from the ISO file.