If you think IE 9 installation caused the issue then uninstall it and install IE8. IE9 is just barely out of beta stage and I feel might need to be adjusted or refined futher before full production use (my personal opinion). If it does not appeaer in your programs list then you could restore you system to a previous restore point. Check to verify that a restore point was created before IE9 was installed. After rolling your system back and re-installing the previous version you can install the IE9 blocker tool which stops the installation of IE9 through automatic updates. This tool does not prevent a manual installation of the browser, it only prevents the installation through automatic updates. I am currently using the tool on 5 of my personal computers.
I suggest using a virtual environment to test drive new release products to verify that everything works as expected before installing them on your personal computers and especially any work computers.
Here are the links:
IE9, 8, 7 download page