This problem occurs when Adobe read9.0 is installed. The solution cannot be found.

When installing Adobe read9.0, the following problem occurs:

 

 

The old Adobe Reader registry is not cleaned up, so the new Adobe Reader cannot be installed. Use the following method to delete information in the old Adobe Reader registry. 1. Start-run-type regedit to enter the Registry Editor. 2. Find the hkey_classes_root \ Installer \ products \ 68ab67ca7da72502b7449a0000000010 and delete the entire [Folder] folder (the folder name displayed on this computer is [Folder], which may vary with other computers, you can use the Add/delete table search function to find Adobe Reader.