Opera freezing and running painfully slow after installing version 58

[A Former User]

A Former User last edited by

Whenever I open Opera, my antivirus (Trend Micro) uses up to 70% CPU and Opera goes from a complete whitescreen to slowly loading pages. Trying to load unpacked extensions results in an immediate freeze with the small pop-up explorer showing no folders. After crashing or closing it, the task takes a minute to disappear and for my antivirus to calm down.

Same story on my laptop: everything worked fine until I updated to version 58.
I thought downgrading to version 55 would help but it did not.

I contacted Trend Micro's customer support but they were not able to help me

Other browsers such as Firefox work flawlessly

I tried:
reinstalling Opera (versions 58 and 55)
disabling various extensions
disabling my antivirus (which resolves the issue temporarily) (!)

OS:
Windows 8.1 (latest updates installed) and Windows 10 on my laptop
Trend Micro 'Maximum Security' Version 15.0.1212