: The rollback was surprisingly stable. Unlike modern software that leaves "ghost files," the Windows 7 system image was quite adept at restoring the IE8 binaries exactly as they were. Performance & Stability Impact
Once you trigger the uninstall, Windows 7 doesn't actually leave you without a browser; it automatically rolls your system back to the previous version (usually IE8). This safety net was crucial in 2011, as many corporate legacy sites were broken by IE9’s new rendering engine. Why Users Did It: Compatibility vs. Progress Uninstall Internet Explorer 9 For Windows 7
Most "reviews" of this uninstallation process from that era centered on one thing: . : The rollback was surprisingly stable