Have you tried the following?
1) Type %USERPROFILE%\Local Settings\Application Data\Google\Chrome (in the run command)
2) Delete the User Data folder (warning backup any important bookmarks etc... as it will delete everything in other words when you next launch chrome it will look like it has been installed for the first time)
3) Launch chrome - if the issue is fixed (
), if not try step 4
4) Uninstall chrome (before you do this make sure you have another working browser as you will need it to install chrome again)
5) Reinstall chrome
P.S. I also recommend doing a virus scan and deleting any programs you don't need.