Try deleting all of the files in the '
..\Divine Divinity\Run\Dynamic' folder.
This folder is used as a cache for the game. Files are created / copied there from the save game folder when you load, and written / copied from that folder when you save a game. The files will be re-created as required the next time you start Divinity. If there was a corrupt file in that folder, deleting the files should fix the problem.
If that doesn't help, try re-installing Divinity. Zip or otherwise backup your saved games folder to another location first, just in case. Then un-install, re-boot, shut down all non essential programs (especially anti-virus), re-install the game. You may be able to start the game and see if the problem persists (games saved under the 1.34 patch will not work in game version 1.29, but testing might work in a new game, depending on where exactly the problem occurs). This is usually not necessary, but would help identify problems cause by the patch. After this, re-boot, shut down all non essential programs, install the patch, re-boot, shut down all non essential programs, start the game. This procedure is a bit over-cautious, but the best way to avoid install problems.
Troubleshooting Tips (& manual install procedure) 
