This may be the case for the following reasons:
1, ISP operators in the allocation of bandwidth is not real allocation, for example, if a community has 100 broadband users, each user has handled 4M broadband, but because these users are almost not at the same time online, so ISP operators to the entire community to provide bandwidth is not a simple 400 Mbit\/s bandwidth. It is very likely that it is only 300 megabytes or even lower, and to the interval of 10 o 'clock to 11 o 'clock, the number of people in the community to access the Internet surge, the total bandwidth of the community can not meet the needs of all people, it will be super slow;
2, the current WIFI network is being rubbed off, this time someone is stealing bandwidth with you;
3, the current WIFI is rubbed off, this time the owner is also surfing the Internet.
wifi to 11 p.m., the automatic shutdown of the performance of the USB wireless card can not receive the signal, the reasons and solutions are as follows: 5, the network setting has a problem.
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Solution: Try to reset the network;