Problems loading data into ArcMap 10.0

[MelvinShuster]

Hello:

A couple of days ago I started having problems loading data into my ArcMap program. I now get the error message: "Failed to connect to database, An underlying database error occurred, class not registered." I believe that this started happening when I allowed Microsoft to make an update to my windows software.

Any help would be greatly appreciated.

Thanks,

Mel

[StevenGriffith]

This is a connection issue between ArcMap and your database. Make sure your database name / userid / password / etc. in your connection are correct. Talk to your DBA (if this is not a file geodatabase), especially if "nothing has changed".

[Leandro-Zamudio]

What are you trying to connect or load into arcmap?

[MelvinShuster]

Leandro:

Thanks for your interest in my problem. I found that if I resaved my excel file in an earlier version that it loaded fine into ArcMap.

Best,

Mel

[DanPatterson_Retired]

Other solutions can be found by searching on your error which may fix that problem, for example see

https://community.esri.com/message/273006?sr=search&searchId=4bccb531-edc0-4a32-a430-e9f70138c0b1&se...‌

[NidhinKarthikeyan]

.XLSX PROBLEM - Failed to Connect to Database - Class Not Registered‌