please help me with this silly Q
所在版块：社会百科 发贴时间：2003-01-21 02:36

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Originally I got an unknown file type .abc;

Suppose I carelessly chose to open it with Real Player, ALWAYS.
And now I wanna undo that operation, letting .abc still be an unknown file type in my laptop. What shall I do?
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please help me with this silly Q － maserati 　2003-01-21 02:36 (221 bytes , 383reads )
Change your folder optioins － 豫北闲人 　2003-01-21 09:14 (400 bytes , 327reads )