单选题：Text 2It was late in the afternoon, and I was putting the fi

Text 2
It was late in the afternoon, and I was putting the final touch on a piece of writing that I was feeling pretty goodabout. I wanted to save it, but my cursor had frozen. I tried to shut the computer down, and it seized up altogether.
Unsure of what else to do, I yanked (用力猛拉) the battery out.
Unfortunately, Windows had been in the midst of a delicate and crucial undertaking. The next morning, whenI turned my computer back on, it informed me that a file had been corrupted and Windows would not load. Then, itoffered to repair itself by using the Windows Setup CD.
I opened the special drawer where I keep CDs, but no Windows CD in there. I was forced to call the computercompany' s Global Support Centre. My call was answered by a woman in some unnamed, far-off land. I find it an-noying to make small talk with someone when I don' t know what continent they' re standing on. Suppose I were tocomment on the beautiful weather we' ve been having when there was a monsoon at the other end of the phone? SoI got right to the point.
"My computer is telling me a file is corrupted and it wants to fix itself, but I don' t have the Windows SetupCD. "
"So you' re having a problem with your Windows Setup CD. " She has apparently been dozing and, havingcome to just as the sentence ended, was attempting to cover for her inattention.
It quickly became clear that the woman was not a computer technician. Her job was to serve as a gatekeeper, ahuman shield for the technicians. Her sole duty, as far as I could tell, was to raise global stress levels.
To make me disappear, the woman gave me the phone number for Windows' creator, Microsoft. This is likegiving someone the phone number for, I don' t know, North America. Besides, the CD worked; I just didn' t haveit. No matter how many times I repeated my story, we came back to the same place. She was calm and resolutely
polite.
When my voice hit a certain decibel ( 分贝), I was passed along, like a hot, irritable potato, to a technician.
"You don' t have the Windows Setup CD, ma' am, because you don' t need it, " he explained cheerfully.
"Windows came preinstalled on your computer!"
"But I do need it. "
"Yes, but you don' t have it. " We went on like this for a while. Finally, he offered to walk me through theuse of a different CD, one that would erase my entire system. "Of course, you' d lose all your e-mail, your docu-ments,your photos. " It was like offering to drop a safe on my head to cure my headache. "You might be able torecover them, but it would be expensive. " He sounded delighted. "And it' s not covered by the warranty ( 产品保证书) !" The safe began to seem like a good idea, provided it was full.
I hung up the phone and drove my computer to a small, friendly repair place I' d heard about. A smart, helpfulman dug out a Windows CD and told me it wouldn't be a problem. An hour later, he called to let me know it wasready. I thanked him, and we chatted about the weather, which was the same outside my window as it was outsidehis.
根据以上材料，回答题。
Why did the author shut down her computer abruptly? A．She had saved what she had written.
B．She couldn' t move the cursor.
C．The computer refused to work.
D．The computer offered to repair itself.