K10 covers a very very large list of processors. Athlon X2 7XXX series, Phenom X3/X4. Athlon II X2/X3/X4, Phenom II X2/X3/X4/X6, a few of the newer Sempron and Turion processors. What processor do you have?
Laptops tend to have poor ventilation and get clogged with dust/pet hair easily. I've always used compressed air to blow out the fans and vents every few months on my laptops.
If the system overheats, your screen will freeze. I would leave it alone. Opening the case and installing a better cpu heatsink (if you could find one) would void the warranty. You may want to try a better laptop cooler. Newegg has one with dual 140mm fans for around $20.