There is data need to use SQL Server R2, directly to start the installation, because it is under the non-administrator account, directly caused the installation failure. The fix also ended in failure. After go to administrator account under the perfect uninstall, you can reinstall.
Method/Step
After the installation fails, use the SQL Server R2 Repair and Uninstall tool
All failed
Search download Microsoft Official Windows Installer clean up
Installation
After the installation is complete, you will need to find Msicuu.exe under C:\Program files\windows Installer clean up, run
Select the SQL Server R2 you want to uninstall (uninstall is not limited to this, you can make any program listed)
Click to confirm
Uninstall after start
Delete the folders you don't need. If you are a neat freak, you can clean up your registry. After that, you can reinstall it.
The perfect uninstall and reinstall tutorial for SQL Server R2