Chunhualo

Sorry for the bother...few days ago my laptop can't turn on after removing the small battery ...and I sent to get bios flash with chip programmer...now the comp is on .but the serial number became 123456789 ..and I dont have back up bios before this flash ...is there anyway I could recover ...I haven't got my laptop back I'm not sure if my previous win8 keys is still in that comp or if there will be any problem with the comp after install windows