This method is actually very simple, ie browser has the function of memory preservation, if you want to set the zoom ratio to 125%, you can first all of the IE window closed, and then reopen an IE browser window and set to 125%, and then the IE window closed, you open IE browser to try, IE is not already default to 125% of the shrink amplification small.
If you go through the above operation, the problem still exists, please reset IE and do a clean boot operation, to eliminate the IE settings and other software interference.
For specific steps to reset ie, you can view the following links:
http://www.iefans.net/ie9-liulan-qqxiangce/#comment-6092
For a clean boot operation, check the links below.
http://social.answers.microsoft.com/Forums/zh-CN/vistaperformancezhcn/thread/424b4486-464c-4169-979c-db4d80f6abab/
If the problem persists after the above operation, it is likely that the permissions on the relevant registry key have been modified to prevent the settings from being saved.
Create a new user account with administrator privileges to confirm that it is normal in the new account.