I am using Window 10 Pro latest updated version 1607 with WLM 2012 on Surface Pro 4 64 bit and am facing problem with Widow live mail search within contents. 

I searched this forum and the internet, have added app data file to Indexing option for my user a/c. Also changed Indexing Options > Advanced> File Type .rss and .nws type of file to Index properties and File contents without any problem.

However, for .eml files, when I want to Index properties and File Contents, it displays "Registered Ifilter is not found". 

Earlier, I had installed WLM 2009 with 32 bit, which after facing this problem, I upgraded to WLM 2012 through Window essentials. Before this upgrade, the problem of ifilter not found was faced even for .rss and .nws files but this was overcome by update to WLM 2012. Pl guide whether this problem of Ifilter not found for .eml files is related to earlier version of 32 bit which I have upgraded to WLM 2012 (which I suppose is for 64 bit)

I can see under C:>Program files > Windows Live > Mail a file wlmimefilter64.dll and also a file C:>Program files (x86) > Windows Live > Mail a file wlmfilter64.dll

I was earlier using Surface Pro 3 and was able to search within contents but not able to do so on SF4. 

Please provide a solution.