Error Code: 0xE001F94E

Hello Meng,

We regret for the inconvenience you are facing with installing the AVG program. Please check whether you have installed any other conflicting applications like McAfee, Avast, Norton etc… on your PC, If so please uninstall the conflicting applications.
If not, please follow the instructions on the article http://support.avg.com/SupportArticleView?urlname=How-to-reinstall-AVG to reinstall all the traces of the AVG program and check whether it resolves the issue.
Note : Please use the AVG Remover tool mentioned on the article to uninstall the AVG program more effectively.
If you are still facing any error message please provide us with the screenshot so that we could analyze the issue more better. Please follow the instructions on the article http://avgclick.me/getscreenshot to create the screenshot.
Please feel free to get back to us for further assistance.
Thank you.

I had encountered the following error message when installing a paid version of AVG Internet Security.
Description: Update cannot proceed due to source/target version mismatch. 
Error Code: 0xE001F94E
What should I do next?
 

Hello Meng,

We regret for the inconvenience you are facing with installing the AVG program. Please check whether you have installed any other conflicting applications like McAfee, Avast, Norton etc… on your PC, If so please uninstall the conflicting applications.
If not, please follow the instructions on the article http://support.avg.com/SupportArticleView?urlname=How-to-reinstall-AVG to reinstall all the traces of the AVG program and check whether it resolves the issue.
Note : Please use the AVG Remover tool mentioned on the article to uninstall the AVG program more effectively.
If you are still facing any error message please provide us with the screenshot so that we could analyze the issue more better. Please follow the instructions on the article http://avgclick.me/getscreenshot to create the screenshot.
Please feel free to get back to us for further assistance.
Thank you.

Meng, If applicable.. For your info, just in case that you are unaware, you can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions. 
AVG Guru