Win10/11 Suddenly system is supper sluggish with > 1 CDRipper window open

[PNWRipper]

I've been using dbPowerAmp for nearly a decade to rip my CDs into flac. It has been great: fast, flexible, useful! But recently (let's say the past year) whenever I launch multiple CD Ripper apps (one for each of my 5 drives) my system becomes super sluggish. The rips appear to be fine and fast. But the computer's UX periodically becomes soooo sluggish:

• When it happens, it comes in waves. When it starts all UX/all monitors/all apps become nearly unusable. It will last for 5 or 10 seconds or maybe 30-60 sec then stop. Then start again after a several seconds or may take a minute.
• It doesn't always happen. As I was writing this 2 disks were ripping. I just started a 3rd and UX started to crawl again.
• When it happens my mouse pointer jumps inches at time instead of pixel by pixel
• The ripping apps' windows often turn whiteish (white screen of death)
• UX processing across all apps slow to a crawl
• Lots of other really nasty UX problems

This *used* to not happen. Something changed (the app, drivers, windows, other?).

On my previous rig (i7-6700K, 64Gb RAM, nvidia RTX 5070, Win10, ....). All drives were SATA3 connected. I tried moving them to USB connection only, same problem.
Since then I have assembled a new rig (core ultra 9 285k, 64Gb RAM, RTX 5070, Win11, ...). In this case all drives (same drives) are USB 3.2 connected. I experience the same problem.

Note: using the same drives with makemkv I have no problem ripping 4k, bluray, dvds simultaneously on either rig.

I truly love this product, but this is killing me.
Please tell me I'm not the only one and that there is an easy fix.

Thanks for any help.

[Spoon-]

If run 2, or 3 does it slow down?

[PNWRipper2]

If run 2, or 3 does it slow down?

I had to create a new account (password recovery does not send email to me).

It increasingly slows down with more instances running. I typically rip in bulk using 5 drives thus 5 app isntances.
When one app has problems they all are impacted. Eg. if one becomes unresponsive then they all show the white screen of death.

Just a year ago I had no such issues. I have updated to newer builds since then.
Current version: 2026.05.25.3

[Spoon-]

If the programs are not ripping they have slow UI?

[PNWRipper2]

No, the cdgrab.exe instances are indeed ripping but the UI's (plurl) are all supper sluggish. My entire system (at least the UI across the system) is taxed. If I move my mouse from one end of the screen to the other, it will pause, jerk and jump. This only happens on this rig if multiple cdgrab.exe are running.

Like I said, this used to not happen at all, even with 5 apps ripping simultaneously. I had to conclude either an upgrade of the app started causing this problem or a shared upgrade to Win10 and 11 caused it.

I am surprised that I haven't seen more posts about this. Certainly I'm not the only one ripping 5 discs at once.

[PNWRipper2]

After rereading your question I think I answered a different interpretation.
Even with multple instances running but none are actively ripping, the UX impact is less but still noticeable. My mouse is smoother, for sure, but you can see slight pauses in its travel across the screen. However if I grab a titlebar and drag the window it stutters and jerks slightly, but noticibly.
Additionally, other windows are less smooth dragging around while the cdgrab apps are running (even if not ripping).

[Spoon-]

Try this, start 5 off ripping and minimise all windows, then open something like Windows file explorer and try to use it, resize, change into folders, it is normal speed?