According to your description, I suggest you refer to the following information:
1. The contact information of Suqian Gold Medal Service Center is as follows:
Address: No.280-15, Dongting Lake Road, Suqian Tel: 0527-8423 12 12.
2. If you need to install the operating system, you can also try to install the operating system with a USB flash drive. For suggestions on how to install windows7 with a USB flash drive, please refer to the following official documents:
I hope the above reply can help you.
If the above information can't solve your problem, you can log on to www.hp.com.cn/chat,, the online chat room of HP Network, and ask an online engineer to help you solve the problem further.