i have a problem with my gadget wimdows 7 ,when i try to drag the clock gadget ,the gadget has been blank ,i try to reset gatget ,its work ,after i restart my computer and drag again ,the gadget will blank again ,please help me -.-

My Computer
- Computer Manufacturer/Model Number
- Acer
- OS
- 7 Ultimate x64
- CPU
- Pentium(R) Dua-Core CPU
- Memory
- 2GB DDR2
- Graphics Card(s)
- Intel GMA 3100 graphic
- Hard Drives
- 500GB