I recently installed the "HP Multimedia Keyboard/Mouse Driver Update - sp26752" so I could configure buttons on my keyboard. Well, not only did this not fix the problem, but it created a new one. Whenever I start my computer I have to bootup explorer.exe manually through the taskbar. Honestly, it's not a huge deal, but it's still annoying.

By the way.. I tried system restore, and needless to say, it didn't work (as always).