I suggest stopping the SpeedUpMyPC program first
and see if that issue persist

To stop:
click the WINDOWs icon
forum.png

run [msconfig]

under services or startup tab, uncheck that program
close MSCONFIG

then start PC again
and open WORD

if the problem goes away, may be reconsidered if you want SpeedUpMyPC

if not, hmm.. have to think again