Dell Inspiron 6400/E1505 Wi-Fi light flashes with wireless activity

I've got the Intel PRO/Wireless 3945ABG card in my Dell Inspiron 6400/E1505 and have been using driver v10.5.1.72 for a few years, but recently upgraded to v12.4.4.5, but found this to be a bit unstable so rolled back to v10.5.1.72. All is fine again except the Wi-Fi light above the keyboard now flashes when there is wireless activity and it's very distracting and annoying. It didn't do this before the update, it was a solid light when Wi-Fi was enabled or off when I disabled Wi-Fi, and it didn't do it after the update. Only since rolling back has it started doing it.

I've tried deleting all v12.4.4.5 DLL and SYS files and registry entries and then uninstalling the driver, but when it detected the hardware it installed driver v12.4.4.5, even though I only had v10.5.1.72 files in the System32 folders and reinstall details. I've now rolled back again and deleted these v12.4.4.5 files and the light is still flashing.

Does anybody have any ideas how to stop the Wi-Fi light flashing please? Am I overlooking a really obvious setting?

The machine is running Windows XP MCE SP3.

 

After a lot of searching I've finally found the fix on another forum and will share it here for reference, then a mod/admin can close this thread if they wish.