"Are you loading Opera with Sandboxie?" No
"Are you using CCleaner?" I was using before (after Opera's problem) now not
"Where do you have Opera installed?" Now C:\Users\Kamil\AppData\Local\Programs\Opera
"Where did you install the standalone and portable versions of Opera? Did you make sure to install them in a space in your userprofile like folders on your desktop where you have read and write access?" Folder on my desktop
In Process Monitor and I've got few results "NAME NOT FOUND", 1 "NO MORE ENTRIES" or "BUFFER OVERFLOW" everything else is "SUCCESS"
And folder VirtualStore is empty
No, I don't have Bitdefender