I’ve used a number of firewalls over the last 15+ years and think you have a great product.
I have some issues with windows drawing improperly under XP Pro SP3 (screenshots attached).
Thank you!
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Are you using windowblinds or some patched uxtheme component?
Please update your 1st post to include additional infos.
That fixed it (WindowBlinds). Thanks!
You’re welcome. 
Adding Cfp.exe to WindowBlinds exclusion list isuly solve this issue.
I’l lock this topic an mark it as solved.