I have a multi-boot system for testing, with both Windows 7 and Windows 10 installed, and I have kept up to date with the latest versions (including betas) of Opus version 12.
Specifically, when opening a folder in the Explorer View, the icons for the list of files on the right, depending on file size can be quite slow, taking as long as 1.5 seconds each to generate. For example, when I open the folder where I have saved the various Opus versions I've downloaded, the executable install files each take nearly two seconds each to show the light bulb icon to the left of the file name. Smaller files, like scripts and text, are very quick to appear.
Conversely, when I restart into Windows 7, I do not see this sluggishness.
Is there a setting in Preferences that will resolve this, or is it something you're aware of. I've browsed previous posts and have not seen any specific references to this.
If you are using Microsoft's antivirus, it is notoriously bad in this department and can affect Explorer as well as Opus. There are many threads on the web complaining about it causing icons to appear slowly.
Other antivirus may also be slow the first time they scan a new, large exe/installer (or the first time they look at one after a virus definitions update), but generally not as slow as the Microsoft A/V, and the better scanners will avoid re-scanning the same file when neither it nor the virus definitions have changed.
Just as information, I've had this issue for years on both Windows 7 and Windows 10, but it seems to come and go. The symptoms will be present for a while and then not present for a while. I haven't been able to identify anything that changes the behavior. There must be something, but, on the surface, it appears to be random.
It's down to the whims of the virus checker, its definitions, and whether the exe files cause it to do a (re)scan that takes a long time.
Also down to Windows unfortunately loading icons from exe files via an API in a way which makes virus scanners think the file may be about to be executed, not just read as data.
Using a better antivirus can greatly reduce the problem. The Microsoft antivirus is terrible.
Except...Windows 10 Defender, upon restart, re-enables real time protection, thus rendering my disabling action moot. I've got another virus/malware program installed, but what's that worth when Defender can't be taken out of the picture? Any ideas, Leo?
Then I suppose Malwarebytes doesn't qualify. I can disable everything and the settings stick except for real time protection, which is what
slows things. I'll investigate further and get back to you.
I ended up using gpedit.msc from the administrator console to disable Defender, and now things work as I was hoping. I've always trusted the brand I personally use for protection, as it finds things the other big name brands overlook.
