This guide shows how to hex-edit Origin to disable operating system check, which allows NFS Heat to download and install on Windows 7.
If this works for you, I'd appreciate if you bought me a coffee.
Check your Origin.exe version:
- For 10.5.66.38849, see revision 8
- For 10.5.64.37936, see revision 7
- For 10.5.63.37653, see revision 6
- For 10.5.60.37244, see revision 5
- For 10.5.57.35162, see revision 4
- For 10.5.56.33908, see revision 3
- For 10.5.55.33574, see revision 2
- For 10.5.52.32372, see revision 1
If the most recent version is missing, please check the comments; if nobody has commented about it yet, please let me know.
Alternatively, you can try the advanced patching guide that should work on any version, but the advanced guide is a lot more involved and there be dragons.
I recommend switching Origin to offline mode, because if the game needs an update, you will have to do this again.
If you don't want to do this every time, the only option right now is to do it once and disable Origin updates. There might be a better solution, but I don't have time to find it.