I am just trying to search for tools in the Search Window in ArcMap as I've done it earlier and it perfectly worked. After writing the name of the tool, it says it cannot find it but I can choose it in Arctoolbox.
How can I fix it?
It is just way easier to use search box.
Best Answer
One possible reason is that the search index got corrupted. Press the Search Options button to the left of Local Search, to open the Search Option window:
On the Index tab, press Delete Index to delete the index, and have it rebuilt by ArcGIS.