Got Driver Cleaner, and installed the latest driver for my video card (Catalyst 4.4) and did both benchmarks once again. Here are the results:
3DMark2001SE: 15638
3DMark2003: 5399
As you can see, the score for 3DMark2001SE decreased while the score for 3DMark2003 increased. Anyways, I am glad I didnt get any issues after uninstalling the driver like it happened to me before.
dan