Voice warnings screwed?

[webresearch]

I recently installed CheckPoint 5 with TT5.2x running on WM5.
Ever since, I just get noise instead of voice prompts, even on the preview within TT5.
Uninstalling CheckPoint and soft reset hasn't helped, and in in fact most of the sounds on the PDA just come out as noise.
Any ideas, I'm planning a hard reset though would rather avoid that if I can!
Latest update, I just deleted a couple of files and it works again, though don't really want to go through the whole process to find out what the files were called.

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