Here’s a another thing to add Is corecount registry entry set? For Mode=2. Registry key which has had a very good impact. Please set the following key before a reboot or restart of Frxsvc and WSearch (first) Name : CoreCount Type : DWORD Value : 1 Location : HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows SearchWhat this does is it causes Windows Search to run single-threaded and it does not appear to negatively affect CPU or responsiveness of Windows search. Bloating of the search index Single thread and multiple mailboxes