What is propsys.dll?
Part of Windows® Search by Microsoft
What is it?
Microsoft Property System for Windows Search, formerly known as Windows Desktop Search (WDS) is an indexed desktop search platform. Windows Search builds a full-text index of files on a computer. Windows Search features incremental search search. The search service consists of several components, including the Gatherer, the Merger, the Backoff Controller, and the Query Processor, among others.
Description of propsys.dll from Microsoft“Windows Search provides an easy and comprehensive solution for finding and organizing the content you care about, whether it's on your PC, in an e-mail message or attachment, on a remote file share, or on the Web. Get a more efficient, comprehensive solution to quickly find almost anything on your PC and across your network. Windows Search 4.0 adds support for indexing encrypted files, and enables PC-to-PC search on every operating system where Windows Search 4.0 runs-while an expansive set of o”
(propsys.dll is a system file that is installed with Windows)
How is propsys.dll loaded?
Approved shell extension - propsys.dll has a CLSID (globally unique identifier) of {97e467b4-98c6-4f19-9588-161b7773d6f6} with and identifier of Office Document Property Handler. When the system detects that the user is downloading an external program that runs as part of the Windows user interface, the system searches for a digital certificate or requests that the user approve the action. If you enable this policy, Windows only starts approved programs.
Windows® Search is loaded by:
Community
What is the community is seeing? | What is the community is doing? |
About 0.1% of all Boost users have the propsys.dll file. | Of the 0.1% of propsys.dll users, less than 1% have disabled it. |
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Typical file (disk image) location:
C:\Windows\System32\propsys.dll
Are there other versions of Windows® Search?
Why are multiple of the same versions listed?
What else is related?
What Windows OS versions does this run on?
Windows 7 Professional (6.1.7601.65536)
About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft
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