It would be much easier for you if you used linux (Debian 8 or CentOS 7)
If it is necessary just NAT a Linux virtual machine on your windows 7 system
The OCS Inventory server for windows is deprecated and a lot of problems and fixes have been added to the latest version of OCS (which is only available on linux/unix systems).
Please refer to this documentation (still in progress) to understand how to build OCS Inventory Server on Linux :
https://github.com/OCSInventory-NG/Wiki/tree/master/english
If it is necessary just NAT a Linux virtual machine on your windows 7 system
The OCS Inventory server for windows is deprecated and a lot of problems and fixes have been added to the latest version of OCS (which is only available on linux/unix systems).
Please refer to this documentation (still in progress) to understand how to build OCS Inventory Server on Linux :
https://github.com/OCSInventory-NG/Wiki/tree/master/english