沒訊號 - 3C

這幾天使用電腦到一半就會突然出現螢幕沒有訊號，主機還是有在跑。
而且電腦的顯示時間也會慢耶！每開機一次就發現時間慢了一點點。
話說兩個星期前也是因為沒訊號才重灌過一次(我的天兵同學也把所有內容都格式化了......)

剛剛開機時，螢幕出現以下訊息

A problem has been detected and windows has been shut down to prevent damage
to your computer.

The problem seems to be caused by the following file: nv4_disp.

If this is the first time you've seen this stop error screen, restart your
computer. If this screen appears again, follow these steps:

以下就是亂碼了

請問各位大大，我的電腦發生什麼事了，該怎麼處理比較好呢

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