我有个同室的机子一插上网线，我们其他人的机子就不能上网了，也不能说完全不能上网，网页那些还是打得开，但像网络电视，上网游戏之类的都不能正常登陆，感觉好像信号是一段一段的。
难道一步机子的设置问题会影响到其他人上网的吗？或是影响router的正常操作。

check what your roomate is doing when he/she is online. he/she may be using some software which demands a lion share of the whole network bandwidth.

she only use to check e-mail or download some mp3 just like a normal internet user. I don't think she has any software require a high brandwidth.(Already checked)