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We regret that AS4741G is not officially supported in Windows 8/8.1 upgrade.
Ref: http://www.acer.com.hk/ac/zh/HK/content/windows81-update
However, if you has Windows 7 HDD image backup, please try to restore to Windows 7 and see if the problem still exists. If so, this may be a hardware problem and may need to be repaired. Plesae call Acer Customer Services Center (Tel: 2520 2000) for more information. |