ArcMap unable to connect to AGOL

[Oliver_Burdekin]

I'm using ArcMap 10.4.1. I can sign into AGOL through ArcMap but when I try to add a basemap / content from AGOL I receive the error message "An exception occured during a webclient request".

Some searching and it looks like it might be a C# error.

I recently updated from windows 8 to 8.1 but have not had to reinstall ArcMap (it just worked after the windows update).

[JayantaPoddar]

Check if any of the solutions in Troubleshooting issues adding ArcGIS Online basemaps to ArcMap | Support Services Blog works for you.

Also a relevant thread Add Basemap throws exception 

If they don't work, you will need to contact your local Esri Tech Support.

[Oliver_Burdekin]

Thanks Jayanta. I'm able to add "My hosted services" from catalog to arcMap. so I suppose this is a problem specifically with arcMap. I've tried "add basemap" and trying to open AGOL from arcMap (file > arcgis online).

While the "Add basemap throws exception" thread makes for interesting reading... I'd prefer not to do a clean install.

[JayantaPoddar]

Close all ArcGIS Desktop Applications (ArcMap, ArcCatalog, etc.), and delete Normal.mxt file in C:\Users\<UserName>\AppData\Roaming\ESRI\Desktop10.x\ArcMap\Templates

Open a new ArcMap Session.

See Resetting your ArcGIS application profile‌ for further details.