Acer Aspire V3-772G - Manual (Page 19)

First things first - 19
2. Disconnect the AC adapter.
3. Use a soft, moist cloth. Do not use liquid or aerosol cleaners.
If either of the following occurs:
• The computer has been dropped or the body has been damaged;
• The computer does not operate normally
Please refer to "Frequently asked questions" on page 88.