What video card do you have, and what driver version were you using before you updated?
This thread discusses an issue being worked on with AMD regarding their newest drivers. If this is the issue, your input could help the team and AMD to solve the problem.
In the meantime, install the driver you were using previously and make a profile to use it with SimCity. The last driver reported to fix it was non-whql-win7-64bit-radeon-software-crimson-relive-17.6.2-june13 (Older AMD drivers can be found here: http://support.amd.com/en-us/download/desktop/previous?os=Windows%207%20-%2064) If you have a newer one that worked, please reply in that thread and let them know what it is.