A family of Microsoft word processing software products for creating web, email, and print documents.
Hi,
Which edition of Word do you use (Word 2003, Word 2007, Word 2010 or Word 2013)?
Do you use a laptop or a desktop computer?
Enable onscreen keyboard and check if the issue is in the keyboard:
http://windows.microsoft.com/en-in/windows7/type-without-using-the-keyboard-on-screen-keyboard
You may also check if you have enabled track changes in Word application, if found disable the same by following the steps mentioned in the links below and verify the status:
http://office.microsoft.com/en-in/word-help/turn-on-or-off-change-tracking-HP003082914.aspx (Word 2003)
http://office.microsoft.com/en-in/word-help/turn-track-changes-on-or-off-HA001218995.aspx (Word 2007)
http://office.microsoft.com/en-in/word-help/turn-track-changes-on-or-off-HA010370561.aspx?CTT=1
(Word 2010)
http://office.microsoft.com/en-in/word-help/turn-off-track-changes-HA102840152.aspx?CTT=1 (Word 2013)
I hope the above information helps. Let us know if you need further assistance.
Thank you.