I have a PC which is having Office XP installed in it.

When i try to make a text in a cell bold the first time in any worksheet, it
takes aprroximately 4-5 mins, but the very next moment if i want to make
another cell bold, it happens as normal. can u help with the reason why it so
happens & is there any solution for the same. I also tried reinstalling
Office (different version) twice after removing the previous installed
version but the problem is still persisting.