Dear FileSeek Support Team,

I purchased a FileSeek licence primarily to search for text within a large collection of documents stored on my computer. Most of these files are Microsoft Word .doc documents created with different versions of Word, particularly Word 97-2003, as well as .docx and PDF files. .docx too (last version office 365)

When I perform certain searches, FileSeek locates the files but is unable to search their contents and repeatedly displays errors such as:

Failed to call IPersistFile.Load. [HR: 2147751692 (0x8004170C)] [System.Exception]

Failed to call IPersistFile.Load. [HR: E_FAIL (0x80004005)] [System.Exception]

In other cases, the following message appears:

No handler found for this file. Searching using the standard method. [System.Exception]

The problem appears to occur mainly with .doc files, although it does not affect every .doc document. FileSeek is able to search inside some files with the same extension, while other apparently similar .doc files produce the errors mentioned above. Therefore, I am unsure whether the issue is related to the specific Word file version, the filters or handlers installed in Windows, the FileSeek configuration, or certain internal characteristics of the affected documents.

I would appreciate detailed instructions on how to configure FileSeek so that it can search within as many files as possible, particularly .doc, .docx, and .pdf documents. Please provide step-by-step guidance regarding the following points:

Which handlers, filters, or Windows components must be installed for FileSeek to search inside Word 97-2003 documents and files created with other versions of Microsoft Word.
How the File Handlers section in FileSeek should be configured for .doc, .docx, and .pdf files.
Whether FileSeek uses Microsoft Office IFilters or its own system to extract text from documents.
How I can verify which handler FileSeek is using for each file type.
Whether there is an alternative search method for .doc documents that produce the IPersistFile.Load error.
Whether I need to install any additional Microsoft Office components, Microsoft Filter Packs, Adobe PDF IFilter, or other software.
Whether the architecture of FileSeek, Microsoft Office, and the installed filters must match, for example, whether they must all be 32-bit or 64-bit.
Whether these errors may be caused by old documents, partially corrupted files, compatibility-mode documents, or files whose .doc extension does not match their actual internal format.
Whether FileSeek can automatically fall back to another search method when the main handler fails, rather than skipping the contents of the document.
What exact configuration you recommend for searching simultaneously through thousands of .doc, .docx, and .pdf files stored in multiple folders and subfolders.

My objective is to enter one or more words and locate every document containing those words, regardless of the Word version used to create the document. Searching only by filename is not sufficient, because I need FileSeek to examine the actual text within each document.

I have attached several screenshots showing the errors and examples of the affected files. I would appreciate it if you could review them and provide the exact steps required to configure the program correctly and obtain the maximum benefit from the licence I purchased.

I can also provide the installed FileSeek version, Windows version, Microsoft Office version and architecture, and a sample file that produces the error, provided that you explain how to send it securely.

My SSOO is Windows 11, last version. I

Thank you for your assistance.

Kind regards,