Spelling Check Probelm in MS Word

Sometimes spelling check in Microsoft Word stops working. There are a couple of solutions which might be considered:

Solution A:

1. Go to "File >Options >Proofing"
2. Tick "Check grammar while spelling" on
3. Tick "Mark grammar errors as you type" on

Solution B:

1. Go to "File >Options >Add-Ins"
2. Select "Disables Items" from "Manage" drop-down box
3. Click "Go" 
4. Select the proper items in the list and click "Enable"