Numerous Issues after an Error in HP Printer

My problem is I cannot access some of my program installed in my computer. Here is what happened. My Gateway laptop is running Windows XP Professional SP3 32-Bit with Internet Explorer 8. I have HP printer software installed in it too. My HP printer got an error while I was printing something and it said something like: “DJ_SF: MARKET RESEARCH STATUS.”  After that error popped up, I can still use the printer. But later on, after a couple of days, I was trying to access my Windows Media Player 11 but I could not get into it. I also could not get into System Restore and other programs. And my toolbar are gone from my Google Chrome browser. I tried downloading the toolbar again, but I cannot download it. I cannot get into Hotmail but I can access Gmail with no problem. I tried using MSTF fix-it but it didn’t help. Please I need some suggestions from the experts. Thanks a lot.