[nikosan]

Okay, so many suggestions -- thank you!! They took me some time to get through, but here's what I've done:

Originally Posted by ownedbycats

I would also consider checking hard drive health and running a memtest.

Checked my hard drive health with that app, got a Status: Green. I am a little shy about running a memtest -- I'll have to look into a how-to for that.

Originally Posted by BetterRed

I'd also try renaming the calibre configuration folder from ..\calibre to ..\calibre-save (calibre not running) and then letting calibre rebuild a fresh configuration

Tried this -- same lag.

Originally Posted by JimmXinu

That said, I did download it and try it in my Win10 Cal5.38 64bit on an SSD. Switching between VL or directly between VM views with this (nearly) empty test library is basically instant for me.

::laughcries::

Originally Posted by JimmXinu

jnikkir's CPU (reported earlier) is a 2017 model according to google, that shouldn't be old enough to make that much difference. Not unless win11 on that hardware is a slug. I remember past windows 'upgrades' that made older hardware basically unusable.

Definitely not a slug. Sometimes it's a little slow if I'm dealing with really large files in Photoshop or Illustrator, or when I have a LOT of programs open at once. But Calibre is usually very fast, and I've run it along w/ no other programs open and it still lags...

Originally Posted by JimmXinu

If it were me, I'd try reinstalling Calibre (and making sure you have 64bit) and rebooting the computer if you haven't already. Not because I have a reason, just because it's a reflex.

Done... no dice. I'm pretty sure I tried that before, but honestly I've tried so much it's all a blur.

Gonna PM my library to BR....