Run the bat file from a c:\ prompt so you can see the output (instead of double clicking it).
DBRepair-Windows.bat Example
c:\Temp>DBRepair-Windows.bat
NOTE: This script is being replaced with the PowerShell script DBRepair-Windows.ps1,
which aims to better emulate DBRepair.sh (more options, interative mode, etc).
Consider moving over to the new script.
14:05:35.19 -- ====== Session begins. (Sun 03/16/2025) ======
14:05:35.44 -- Exporting Main DB
14:05:36.14 -- Exporting Blobs DB
14:05:36.20 -- Exporting Complete.
14:05:36.20 -- Creating Main DB
14:05:36.44 -- Verifying Main DB
14:05:36.50 -- Main DB verification check is: ok
14:05:36.50 -- Main DB verification successful.
14:05:36.51 -- Creating Blobs DB
14:05:36.58 -- Verifying Blobs DB
14:05:36.62 -- Blobs DB verification check is: ok
14:05:36.62 -- Blobs DB verification successful.
14:05:36.63 -- Import and verification complete.
14:05:36.64 -- Reindexing Main DB
14:05:36.71 -- Reindexing Blobs DB
14:05:36.86 -- Reindexing complete.
14:05:36.87 -- Moving current DBs to DBTMP and making new databases active
1 file(s) moved.
1 file(s) moved.
1 file(s) moved.
1 file(s) moved.
14:05:36.88 -- Database repair/rebuild/reindex completed.
14:05:36.88 -- ====== Session completed. ======
c:\Temp>