Change advanced indexing options in Windows 7

In my new pc i found that the process searchfilterhost.exe using up to the 100% of the cpu usage, thats why my desktop was really really slow to do any task at all. As i tried to make some online research and study which took my process to free of usage. here i have mentioned some steps which will really works exactly to remove the searchfilterhost.exe process and works the computer very fine.

If you use an unusual file type that's not currently recognized by the index, you can add it to the index so you can search in Windows by that file type. It can be helpful, if you want, for exampe, to search in a folder with a lot of files (txxt, pdf, doc, etc).
Open Indexing Options by clicking the Start button , and then clicking Control Panel. In the search box, type indexing options, and then click Indexing Options.
Click Advanced. If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
In the Advanced Options dialog box, click the File Types tab.
In the Add new extension to list box, type the file name extension (for example, "txt"), and then click Add.
Click Index Properties Only or Index Properties and File Contents, and then click OK.