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I have installed MS Office 2007, but no matter what i do i can not get Powerpoint to start.  When it launches it says that the last time it was opened it failed to open correctly, so do i want to open in safe mode, no matter what i select it just flashes the logo and disappears.

When I try again, it may say Powerpoint failed to open in safe mode do you want to repair, again it just disappears.

I have uninstalled Playonlinux and reinstalled, and I have also tried doing the same to MS Office, all to no avail.

If I click the Playonlinux launcher I get the following error message too

I have no issues on any other machines, just this one.

OK solved it myself in the end.

Needed to change riched20.dll to (native) in winecfg

Either by doing a search (Catfish File Search) for the file "winecfg", opening it and adding riched20 to the list of applications in Library as below, or
by going in to PlayonLinux app, selecting "Configure"
Select the "Virtual Drive" on the left (should be "Office 2007" or so)
Select "Wine" on the right.
"Configure Wine"
Selecting "Libraries" and the selecting it from the drop down menu "New Override for Library".