Windows 7's start menu's search "see more results" is broken

"Not sure whether you found a solution to your problem, but I had the same issue on my PC (running Windows 7 Pro 64 bit), and found the fix here (copied below), specifically the part where it says change the registry key SetupCompletedSuccessfully to 0.

NOTE: Using this fix will reset all your search/indexing options and cause your index to be rebuilt.

Important: The instructions below contain steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information view the article in the Microsoft Knowledge Base: How to back up and restore the registry in Windows

Press Windows + R (Opens the ""Run"" window)
Type regedit and press Enter.
In registry editor, locate

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Search

In the right pane, right click on SetupCompletedSuccessfully and click on Modify.

NOTE: If SetupCompletedSuccessfully is not there, then in the right pane, right click on a empty area and click on New select DWORD (32 bit) Value and type SetupCompletedSuccessfully and press Enter.

Type 0 and click on OK.

NOTE: This is the number zero. Note that when you zero the value below, the system will erase all your parameters you entered in the index options, a.k.a. the directories you list. So you'll be back to default values.

Close Regedit
Restart the computer"

"I had a client with a similar issue, I exported the HKCR\search and HKCR\search-ms from a working machine and that seemed to fix it.

I have uploaded the .reg file I used."