you are missing those buttons? what about Reset Web Settings button?
Tools -> Internet Options -> Programs tab -> down at bottom of window will see a button to Reset Web Settings Click it make sure "Also reset my homepage" is checked then click Yes Click OK
If you use SpyBot-Search & Destroy TeaTimer click Allow Change when you're prompted.
If you aren't running SpyBot-Search & Destroy TeaTimer (or a program like it) i suggest you do. you can get SpyBot -Search & Destroy Here