能正常進入Windows界麵嗎？還有是本本還是台式？

如果能正常進入Windows界麵才出現錯誤，而且能夠正常打開執行文件，可以嚐試做restore：
start-> (?)help and support->Pick a task: choose"Undo changes to your computer with System Restore", then follow what you are instructed step by step to restore the symstem a day or several days before the mistake taken place. then the computer will restart and your computer will be normal as before.

If you can't log into the window, or it is a labtop, you have to start the computer. after the "setup" step, press"F5" or "F6" (I can't recall which one, it might be some other "Fx"button)then choose the restore item. do the same restoration as above.