Excel Fails when add-in is selected
 

I just purchased a new computer and noticed one of my
formulas was't working. I added the analysis toolpac.
which fixed the formula. When I came back into my
spreadsheet I noticed some of my graphics were gone and I
couldn't scroll. It was very slow and sluggish. I did an
Office XP repair which didn't solve my problem so then I
reinstalled it. My OS is XP Home. All updates have been
done both in Windows And in Office. Does anyone have any
ideas?? Thanks for any help.

Ron