winhost.exe is a hijacker which means it will intermittently change your Internet Explorer settings / Desktop to the link of it’s author’s sponsors. This program is usually installed through consent, however is sometimes packaged as another product. It is a registered security risk and should be removed immediately.
Try using a spyremoval program such as Spybot or Ad-ware
, i wouldn't delete the file, because to get rid of it, it might require that file
Also look for the virus name at
Symantec Virus Removal
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