Outlook 2007 takes ages to show emails on startup

I've scanpst.exe the .pst file
I've repaired office profile
Same result
One minute to see email "loading .........
Its an i5 processor with 8 gig ram
Was ok 6 months ago but driving me mad now
 .pst file is approx 3 gig

What to do next  ?
feck1Asked:
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REITCommented:
Have you ensured you've installed all Windows Updates? Also have you ran a repair on the Office Install? Could be the pst causing the performance issues, maybe try create another pst and move some emails to it, also ensure outlook doesn't have cached exchange mode on as this is a potential cause of performance issues.
Thomas WheelerCommented:
Check your outlook plug-ins as well. They are loaded at startup aND can cause slowdowns

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