thu 1: la` loa hu
thu2: do cup
thu3:koi lai volume o goc phai duoi man hinh
thu4:loi drived cua cpu
pan co the kt bang cach nhap chuoc phai len mycomputer chon properties=>hardware=>dvice manage.coi co dau hoi nao mau vang k.neu co thi ban bi loi drived roi` do.len mang zo google.com tim thong nam tren men cua ban do roi` tai drived ve` chay lai la xong.
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