I am having a Compaq Presario notebook, this is running with windows vista OS, the machine is specified with Intel dual core processor, and 3 GB RAM, 320GB hard drive, along with this NVIDIA GEForce graphical interface. Recently I upgrade the machine from Microsoft office 2003 to 2010. Which was working fine till the last day, but from then suddenly the office tool application is starts a problem during execution, I am not able to open the office tool application, if there is any other program I opened in my machine, after click on it simply directs that the program is running with some other program. I checked but did not found any instance of office ’10. Why this problem occurring is there any one having any information or suggestion regarding this? Any input will be appreciated greatly.