Yes I have run Office diagnostics. Sorry I forgot to include that in
original text. No issues found. If I try using a new pst, won't I lose all
my contacts?
As long as you don't delete the old one, no you won't lose them. Try a new
profile to see if it fixes the problem, if it does, then open the older pst
using file, open, outlook data file and drag the contacts (and other stuff)
to the new folder.

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> Yes I have run Office diagnostics. Sorry I forgot to include that in
> original text. No issues found. If I try using a new pst, won't I lose
[quoted text clipped - 47 lines]
>> > previously.
>> > Thanks in advance.