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Photoshop CS4 lag, stalls and lockups

I am having issues with Photoshop CS4 on a users Lenovo Y550 laptop. It seems the software seems to lag or lockup when the user moves or modifies a layer. I have read many threads about openGL and such from Adobe helps sites but nothing has seemed to help me fix the issues. Does anyone have any ideas?

Lenovo IdeaPad Y550 4186
Core 2 Duo T6600 / 2.2 GHz
HDD 300 GB
VISTA BUSINESS (had to downgrade - our company does not use WIN7 yet)
Intel GMA 4500M UMA graphic card
Watch Question

Have you moved the scratch disk off the disk where the app is running from?  Having them on the same disk/partition can cause performance issues...


Have a 30 GB partition which we have changed the scratch disk to, but still the same issues.
FYI - I fixed it myself. Looks like Photoshop needed an update. I ran the updates and this resolved the issue and even recognized the INTEL Driver.