Nexus Mod Manager Suddenly Stopped Working PLEASE HELP!

[DARTHSQUIRREL1217]

So I've been downloading mods for Fallout 4 and Skyrim for a while now, and it's been working just fine. Now, all the sudden when I try to start up Nexus Mod Manager, it brings up a browser error page that says:

This page can’t be displayed

•Make sure the web address //ieframe.dll/dnserrordiagoff.htm# is correct.
•Look for the page with your search engine.
•Refresh the page in a few minutes.

I've been looking everywhere for a potential fix to the problem, but I can't find anything. Has anyone else ever had this problem? It only started happening after I tried to install this mod: http://www.nexusmods.com/fallout4/mods/6155/? (Craftable Ramps and Rails)

Please help because I'm getting really frustrated by this and I feel like if I never fix it I won't be able to use mods.

Oh and I feel like I should mention the fact that it keeps prompting me to download the Microsoft .NET framework, but when I try to install it, it says it's already installed and refuses to go further.

Edited December 26, 2015 by DARTHSQUIRREL1217

[DARTHSQUIRREL1217]

Not sure why the text is highlighted. Oh well

[mwhenry16]

If you have backed up your install information, ini's, etc, just delete anything and follow the instructions. If you haven't backed up, start to do so. A handy and easy to follow guide,

http://wiki.tesnexus.com/index.php/Backing_up_your_mod_list_and_load_order, is there to help. Personally, not being very technically proficient, I back my files up every day, or after a few mod installs. It makes it easier, for me at least, to isolate which mod may be helping cause the problem. Are you using loot to sort the mod order? If not, you should.

http://www.nexusmods.com/fallout4/mods/5310/?

I would suggest also familiarizing yourself, if you haven't already, with using F04edit, with which you can check individual mods.

http://www.nexusmods.com/fallout4/mods/2737?

Good luck!

[DARTHSQUIRREL1217]

I do use loot, but I haven't backed up my ini's and install information. I'm pretty sure the problem isn't with mods I've downloaded, but with the Microsoft .NET framework that is "missing." Thanks for the help though.