Proscan PC
192.168.1.13
????
192.168.1.1
Non Proscan PC
192.168.1.12
????
192.168.1.1
In cmd prompt - ipconfig will give Ip and subnet mask (expect it to be 255.255.255.0 ) as long as they the same on each PC etc then it will be fine.
The fact you cannot ping means either 1, they are on different subnets or 2 there is a firewall somewhere blocking ICMP.
If it is indeed a firewall, then chances are it is also blocking access, and most likely would be by blocking inbound connections - e.g the PC hosting pro scan denying any connections, resulting in other PC - phone etc not allowed to connect.
When you uninstalled Norton, from memory it will then turn on Windows FW by default, did you then turn that off and test ?
I would suggest on both PC's ensure :
1. Same subnet mask ( 99.9% sure it will be ..but hey been doing this too long to say 100%
)
2. Both have Norton or any other FW software uninstalled
3. Windows FW turned off on both
4. Ensure you can get each PC pinging the other - once this is working the rest should fall into place.
5. Should that get everything working- turn on FW's 1 by 1 and test - if it stop then can work on fixing the issue and allowing the FW's to operate.