Go up one level and check the Local and LocalLow folders; delete any folders there as well. 2. Registry Cleanup (Advanced) Press Win + R , type regedit , and hit Enter. Back up your registry first ( File > Export ).
The Windows Installer engine holds cached MSI data that clashes with the new software.
By methodically working through the solutions above, you will clear the error, save hours of frustration, and get back to using your Adobe software normally. Always remember to back up critical data before editing the registry or running system-level repairs.
In extreme cases, a (keeping your files) or a clean OS reinstall may be necessary—though very rare for this specific error.