Edit the Win.ini file to correct the issue.Check the setting value concerning MAPI on the problem PC like below:
Note: Be very careful when changing the Win.ini file.
1) For the [Mail] section in the Win.ini file, it should be MAPI=1. If it's set to MAPI=0, change the value to MAPI=1. If MAPI=1 does not exist, please add MAPI=1.
2) MAPI32.DLL should exist (if your PC is Windows XP, it is usually in C:\WINNT\System32). If MAPI32.DLL does not exist, the operating system might be corrupted.