Remote DVR webpage not displaying

Most likely add-ins and/or active X controls. Take a look at the security settings in the browser on your friends laptop and compare to your own. Could be as simple as your browser not prompting you to install an active X component.
That is assuming you are using a web browser to access it.
Also, look at Windows firewall and or any other security software you may be running such as Norton, Trend Micro, etc. These could be blocking it as well.

We both have same laptop and same software.  Nothing is different on either one of ours.  

All settings and configurations are exactly alike?

yes.  because i had rebuilt both laptops

Are you using Internet Explorer or another web browser to access the DVR or is there an actual piece of software that you had to install for accessing the DVR?

I am using IE to access the DVR.  I have not installed the software on site.  

I would have to believe that some of the security settings within IE on your laptop and your friends are different. Please check by going to Tools -> Internet options -> Security tab -> Highlight the Internet icon and compare the security settings there to the settings on your friends laptop.
Regardless of the fact that you loaded both of these laptops, it is not uncommon for settings to be different with IE for various reasons. I believe if you do this and change your settings to match your friends you will resolve the issue.
Of course there is always the option of going to the Advanced tab and selecting the Reset button at the bottom. This will essentially set IE back to defaults and can often clear up a lot of issues. Make this your last option however.

I had already done "Reset to Default".  It still doesn't work.

I have 2 sites that I remotely watch the camera.  Both sites are registered with free DynDNS under one login.  I am successfully able to open the first site but the second site is somehow not working on my laptop.

Verify the URL you have set up in DynDNS, change or add an additional one to see if it make any difference.

hmmmmm.  if both sites work on my friends laptop, then the URL must be correct in DynDNS.  It seems like a local problem than URL or configuration problem.  Am I correct to say that?

You would be but, you need to get creative here if everything is working properly and there aren't any differences/changes then you need to get outside the box and try something different.
The only things that should stop you from hitting a specific URL are add-ins, security settings, security software, firewalls adn things like that. So if you are ruling all of that out then it's time to get creative.
Your original post was that you could not access the DVR and your friend could. That has now changed to be that you can hit 1 of the URL's but not the other. So this is like a new problem and different from the originally posted problem.
Try adding the url to your trusted sites under Internet options -> Security -> Trusted Sites

I would obviously welcome anyone else's input on this issue that can perhaps bring a different perspective to things.

My post is still the same from original.  It's just that before I mentioned I couldn't access the DVR in question and I still stand by it.  I just thought I inform that I have multiple sites and I can access the other DVR but not the DVR in question, so that we don't try to debug the problem of URL, Firewall or other services including DynDNS issues.

Understood, but without putting eyes on it at this point, I am out of ideas for the moment. I do apologize if I have been no help at all.
I would suggest one last thing.
Temporarily disable any firewalls running on your machine, disable your AV, etc. (obviously temporarily) and see what happens just to rule it all out once and for all.

I sure will try that for once.  Although I have no firwall software running.  My firewall is an appliance and not a softeware.  Hence no firewall software installed.  I will definitely try disabling Norton Anti-Virus and test it out.

Thanks

i had disabled all firewalls and anti-virus programs.  in fact i had also uninstalled it and reset my IE browser, still no luck

Are you still able to access the other DVR(s)

Yes I am without a problem

Just for the sake of argument and to eliminate IE as the problem or to isolate it as the problem, can you please try using Chrome and/or Firefox to access the DVR from your laptop.

I have tried firefox and safari.  none work.

I searched online for problem regarding the DVR and remote access.  From reading the blogs and other articles, it seems like the DVR is incapable of remotely accessing via a 64bit browsers.  Especially this model.  My other store has different model of DVR which I believe can handle 64bit browsers.

So I think I may have found the solution but I am not 100% convinced.

Is your co-worker's 32 bit or 64 bit? Easy enough to verify.

I've requested that this question be deleted for the following reason:

Found my own solution

Found my own solution

Those suggestions and pointers were given in answers to this question.
Regardless, close the question since the poster believes he arrived at the solution on his own.

64 bit Internet Explorer will not work with some older models of DVR.  Hence I had to use Firefox or a 32 bit of older IE.