I finally find out it is the spyware cause it! Thank everyone
When go online today I find that all wed page can't show pictures. After I go to Internet Properties-advanced tag I find that the the show pictures box is unchecked. But after I check that box and retart my comptuer the show pictures box keep uncheck again! I wonder if anyone know how to keep the show picture box check? I even try reset internet explorer settings still can't fit it. Optiplex 745 Windows Vista 64 bit Business Core 2 Duo E6400 2.13 Ghz256MB NVIDIA GeForce(R) 7300LE250GB SATA 3.0Gb/s Hard Drive4GB NECC Dual Channel DDR2 533MHz SDRAM22" Entry Wide Screen Flat Panel LCD Monitor
Internet explorer-show pictures keep uncheck