I've had the bar not going away issue before, and I've seen it for the following reasons:
1) Extensions or Addons installed in the browser can be causing issues (try disabling them all and re enabling one by one)
2) Your Chrome profile might be corrupt, try uninstalling Chrome, and also deleting the "C:\Users\Username\AppData\Local\Google\Chrome\User Data" folder and reinstalling Chrome (note the Chrome website automatically sends the 32-bit Chrome when you download, but if you look closely on the download site you can find the 64-bit Chrome)
3) As funny as it sounds, Chrome uses GPU acceleration, sometimes updating your GPU drivers will also remedy this issue (if that's the cause of course)
4) If none of those help, perhaps it's...