What is Reddit's opinion of
Angry IP Scanner?
From 3.5 billion Reddit comments
5 reviews of this app found across Reddit:
Angry IP scanner v2.x (not v3 - it is much slower). Fast, portable, quick way to see what's active on a network, what ports are open, etc.
CutePDF - simple print to pdf, faster than Acrobat. I like to make PDF copies of all online receipts, confirmations, etc. Not a tech, but still necessary for documentation.
Get Angry IP Scanner http://www.angryip.org and scan the network for IP addresses that respond. Take those IPs into a spreadsheet and check every device.
Use ipconfig /all of a PC on the LAN and find your local DNS and DHCP server. From the DHCP scope you can whittle down the IPs.
Angry IP Scanner will show you every device in a given network range, and can optionally scan for open ports as well. It's pretty barebones, but should meet your basic needs (portability included).
There is nothing wrong with GMER, but it has some advanced scanning tools built in to it and it is likely that your AV is just seeing those and marking them as questionable. I often use a tool called Angry IP Scanner to scan for live IPs for a given subnet. Because it uses certain scanning functions, MSE always marks it as bad, even though it isn't, because it could be used maliciously. That is the nature of AV.
The better question is why is GMER running in the background. GMER is not an installed program, it is a single executable that looks for rootkits. It should not be autorunning. The only thing I can think of is if something else on your system is calling itself GMER.
If you know the subnet it's in, you can use a port scanner (like angry ip scanner) and scan for hosts with port 9100 (HP Jetdirect) open. If the printer is still on the network, it should show up there-- along with any other HP printers. From there you can try and access the printers' http/s interfaces to find the one you're looking for.