Unable to open attachments

Hi Peter.
We're here to help. Since when are you experiencing this issue? Which version of AVG TuneUp is installed on your PC?

Thank you for the info, Peter. 

Are you able to open AVG PC Tuneup on your computer? 

Open AVG PC Tuneup -> Speed up (second component) -> Background and Startup programs -> remove from sleep mode if Outlook application is added there. 

If the issue persists, undo changes done by AVG PC Tuneup as suggested here: https://support.avg.com/SupportArticleView?urlname=Troubleshoot-AVG-PC-TuneUp

I uninstalled Tune Up and then re-installed. I have ignored the "speed up" option and I can now open the email attachments.

I am using Outlook email (exchange) and unable to open Office file attachments (such as Word and Excel). PDFs open OK. The error message is:
"TUAutoReactivator64.exe - Application Error". Application unable to open correctly (0xc000007b).
The exe file is located in AVG PC Tune Up. 
How do I correct this problem?

Thank you for the info, Peter. 

Are you able to open AVG PC Tuneup on your computer? 

Open AVG PC Tuneup -> Speed up (second component) -> Background and Startup programs -> remove from sleep mode if Outlook application is added there. 

If the issue persists, undo changes done by AVG PC Tuneup as suggested here: https://support.avg.com/SupportArticleView?urlname=Troubleshoot-AVG-PC-TuneUp

I am using AVG TuneUp version 16.79.3.36215
AVG software version 18.8.3071
UI version 1.0.134
 
Thank you, Peter

Glad to hear that your issue has been resolved.
It could have caused due to Outlook or MS Office application was put to sleep from running in the background.

If you need anything else, do not hesitate to let us know.

Hi Peter.
We're here to help. Since when are you experiencing this issue? Which version of AVG TuneUp is installed on your PC?

Thank you for the information.

Can you provide us the screenshot of the error message?