Spacing problem in powerpoint 2010

On my destop, the spacing between letters and words in the powerpoint is lengthened ; same text appears normally in "Word" . and the same powerpoint appears normal on other computers. I tried to fix this problem from spacing tab but it does not work. I uninstalled and reinstalled microsoft office 2010 but the problem stays the same. My friend installed microsoft office 2013 and reformatted, it was back to normal. Now suddenly that spacing problem come back again. Is there something wrong with my destop and how can I fix it? Please help.