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Question

i have a strange problem,please solve this.

Mar 10, 2015 8:43AM PDT

laptop - lenovo z580 ideapad , 4gb ram , windows 8 64 bit,i3 processor.i bought it in 2013.suddenly my internet connection becomes limited.when i disconnect and connect,my laptop freezes and shuts down.and sometimes,it heats up and shuts down,and sometimes,it becomes slow and then shuts down.i tried re-installing windows,refreshing my pc,re-installing my network adapter, but it seems to be of no use.

Discussion is locked

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Clarification Request
How long since you cleaned it with canned air?
Mar 10, 2015 9:06AM PDT
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Answer
My guess
Mar 10, 2015 9:08AM PDT

is the internal wifi has gone bad. Tried a USB network device yet, turning off the internal one?