I hope you've corrected the problem by now, but this is what I did.
Go to C > Documents and Settings > Your Name > Application Data > IBP and delete the directory manually. If you cannot see that directory, you have to make it visible. To see hidden files:
1. On the Tools menu in Windows Explorer, click Folder Options.
2. Click the View tab.
3. Under Hidden files and folders, click Show hidden files and folders.
Note To access Windows Explorer, click Start, point to All Programs, Accessories and then click Windows Explorer.
I also found another version of IBP in my All Programs (you may want to check there as well). Go to C > Documents and Settings > All Programs. At any rate, you can conduct a "Search" and it will reveal the path of the IBP folder. Simply delete it and anything else that appears to be associated with IBP. DO NOT delete anything you are not sure of as you may be deleting critical files for Windows to run properly.
When you are finished, don't forget to click the "Do not show hidden files and folders" or click Restore Defaults within Windows Explorer so you don't inadvertantly delete critical files (On the Tools menu within Windows Explorer, click Folder Options; Click the View tab; Under Hidden files and folders, click "Do not show hidden files and folders" or click Restore Defaults .
Hope this helps