ExPat in China dealing with a Virus

My company moved me from the United States to China a few months ago.

Just recently I have been having problems surfing the net and going to my company's dedicated realms.

I seem to get redirected to a 114.Vnet.cn site. It is totally masked and shows only my originally inputed site, but of course the web page is showing used car ads and other stuff in chinese. I only found it's web address through the site properties. It is sparatic and I've dealt with Microsoft, Avast!, and our team of IT professionals, to no avail. I've cleaned out my cookies and temp files. I scanned and deleted files and it still pops up. My security settings are so HIGH, I can't even function with daily routines. Any ideals or settings to eliminate this pest.

Thanks,