(1) the correct dao360.dll is generally in c: \ Program Files \ common files \ microsoft shared \ Dao, check whether the version is correct and not replaced, and then re-register
Run "start"-> "run" input: regsvr32 and drag dao306.dll to the "run" window. Press enter to complete registration.
(2) How to fix ArcGIS file registration information
If the file registration information of ArcGIS is incorrect, unexpected results may occur. You can try to fix the registry information.
Start: @ echo registering files...
@ For % F in (*. dll) do start/Wait regsvr32/s "% F"
@ For % F in (*. olb) do start/Wait regsvr32/s "% F"
@ For % F in (*. ocx) do start/Wait regsvr32/s "% F"
@ Echo registering help files...
CD .. \ Help
@ For % F in (*. olb) do start/Wait regsvr32/s "% F"
End
Copy the content before "start" and "end" to the text editor and save it to the bin subdirectory of the ArcGIS installation directory. Name the file registerarcgis. bat. Double-click the BAT file to fix it.
(3) Find the ArcMap user data file, usually in
C: \ Documents ents and Settings \ kchyang \ Application Data \ ESRI \
Delete the ArcMap folder
(4) Restart ArcMap
If you have tried the above methods, you can only uninstall and reinstall ArcGIS.