Win7 system can not be reinstalled after uninstalling CAD solution

1, mouse click win7 system "start" menu, select "run" <; option;
2, in the open "run" dialog box “regedit” character command, press the OK button;

3, in the left side of the open registry editor, expand:
“HKEY_LOCAL_MACHINESOFTWAREAutodeskAutoCADR18.0”Options;
4, right click R18.0 option, click to delete the entire item, including the key value under it;

5, expand: HKEY_CORRENT_userSOFTWAREAutodeskAutoCADR18.0 option, right click to delete the R18.0 option;
6, expand: HKEY_LOCAL_MACHINESOFTWAREClassesInstallerProducts option ;

7, find the 7D2F38751008xxxxx option under the Products option, right click on the mouse to delete the item, and then re-install!