I beleive that you have the trial version of office and that it has expired. If I remember correctly when I got the trial version of 2010 it did the same thing for me, until I purchased the software.
My Computer
Computer Manufacturer/Model Number
Custom built
OS
Windows 7 Ultimate 64 bit
CPU
AMD Phenom II X4 965 Black Edition
Motherboard
Gigabyte GA-MA790X-DS4
Memory
GSkill 4 X 2 GB PC 8500
Graphics Card(s)
XFX Radeon HD 6790 D
Sound Card
On board RealTek HD
Monitor(s) Displays
Dual monitors:Samsung SyncMaster S20B300
Screen Resolution
1600 X 900
Hard Drives
Seagate Barracuda 1TB (primary)
Seagate Barracuda 2 X 320 GB
PSU
Ultra X4 750 watt fully modular
Case
Thermaltake Overseer RX 1 full tower
Cooling
Core-Contact 92 mm CPU Cooler
Keyboard
Logitech G510
Mouse
Razor DeathAdder
Internet Speed
50/5 Mbps UL/DL
Other Info
Optical: Super Muliti DVD burner w/lightscribe, Hauppauge WinTV HVR-1800