Hi:
You can order a set of recovery disks for your p6-2033w desktop by clicking on the link below and then click on the link labeled Order Recovery Media.
If you want to have a go at making your own plain W7 installation media, you can do that if you can read all 25 characters of the W7 product key on your PC's case.
Here's how:
Link to the W7 ISO file downloads is below. Download the applicable version of Windows 7 that is on your product key (Home Premium, Pro, or Ultimate). The SP1 Media Refresh files are the latest ISO files.
Use the Windows 7 USB/DVD installation tool to compile the ISO file you download from Digital River. Link below. You need a DVD or a 4 GB flash drive to use the USB method of compilation.
Use the 25 character windows 7 product key to activate your installation.
http://download.cnet.com/Windows-7-USB-DVD-Download-Tool/3000-18513_4-10972600.html
Then go to the PC's support and driver page to install the drivers you need.