Windows Search (SearchIndexer.exe) terminates unexpectedly due to SWV driver.
It can be reproduced with following steps.
1.  Install Symantec Workspace Virtualization

2.  Create a Layer

3.  Active the layer

4.  Start "Indexing Options"
    [Start] > [Control Panel] > Put [Indexing Options] in Search box, then start "Indexing Options"
 
5.  Click "Modify" and add the folder where Layer's program files are installed as a Indexing location

6.  Click "Advanced" and run "Rebuild" on Trobleshooting

7.  After step 6, Windows Search service terminated with the following system event log

The Windows Search service terminated with the following error:
Cannot create a file when that file already exists.

Windows 7 Operating system Searchindexer.exe

This Issue has been addressed and shipped in the release vehicle SWV 6.1 SP8 MP1

Reference : Fixed issues - Release notes available @ http://www.symantec.com/business/support/index?page=content&id=DOC5810

Applies To

Product:
Symantec Workspace Virtualization (SWV) 6.1 SP7 MP1 HF3(6.4.1358) and later

OS:
Microsoft Windows 7 Enterprise Service Pack 1