How to change engine yahoo of google search as a default startup or default mozilla page

Yesterday, my friend was install Filezilla on my pc.
Then automatically my pc loads very slowly.
I check my network, then I found this site below automatically
(id.search.yahoo.com/?fr=hp-ddc-bd-tab & type = bl-bfr-ob-rhb-33__alt__ddc_dsssyctab_bd_com)
There seems to replace my mozilla until today start page.
I was uninstalling all filezilla and other unnecessary programs from my pc to get, it's good to return.
But, unfortunately it does not at all.
I try to replace and remove all search engines in the frame on my mozilla and it does not work either.
This case has already come for views, and she finished with the Format of the hard drive.
I don't want to do this, and I emphasize on this issue.
Please, any idea, I hope that this might help me.
Thank you..

Hi, this often comes with unwanted program, so I'll try these free programs to search for malicious software that work with your existing anti-virus software:

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP, if you do not already have one. Windows 8 already has integrated antivirus.

More information can be found in the article troubleshooting Firefox problems caused by malware .

Note that not all programs removal allows to detect all malware, you may need to run multiple or all of them.

After the removal you may need to reset your homepage, search etc, what you can do by running the add-on SearchReset.

See also use the Firefox search bar.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

Tags: Firefox

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