I'm using the dvr's IP address which I type into a search bar in my web browser. Those installers did not configure anything for me. I will probably have to spend hours playing around with it to understand it all. Also, one of the cameras is not configured properly since it has a Menu Settings directly in the middle of its image. I suspect that they forgot to configure it. I even have a hard time trying to understand exactly what model number and make of DVR and cameras they used. Everything has generic terms such as "DVR" or "TVI camera". Even the PDF from the disc they left me says nothing other than "DVR Instructions" (no model number listed anywhere). Apart from all that I'm actually happy with the images and how it all appears. Also very happy with the audio which is crystal clear.
If they didn't configure anything for you i would do these things:
-check to make sure your time zone is right, it comes in Beijing Time Zone
-set the Day light savings time
-increase the pre and post record time of the video so you don't miss what happens when motion is triggered (default of 5 seconds isn't enough imo), think it is under Config->camera setting->Schedule->advanced
-while you're in there make sure audio is recording too, not sure if it is on by default.
-try to learn how to search footage/ and back up your computer, since you said your unit is hidden...and last thing you want to do is call your installer who will charge you $50 to come to your site only to find out he probably doesn't know how to back up either then call tech support and wait an hour with the cops behind your back (true story)
-make sure you have a good estimate on how long you can record for, your unit can take up to a 6 TB HD if you need more storage, and you don't want to find out something important got overwritten because he cut corners and gave you a 500gb Green drive (you can check your HDD size under HDD management)
-if you will change your password, write down what you changed it to, the installer probably doesn't know how to reset it either.
-since you are using your PC, you can turn on auto-start live view/resume live view status under Local Configuration, so the webpage will remember what you were watching and save you some time from clicking play on each camera