From these symptoms I’m wondering about the health of the hard drive.
I’d like to make a suggestion: start a new thread. Give us all the info you have in the problem statement. Tell us all about your computer, the version and build of BIAB, and the history of what you’ve tried and the results. I know this will take effort, but I think it could help.
I took the day off from work to get through this issue and work on a few other "honey-dos."
The program is running well now, although it does drag a little when I include solos.
In fact, I started having this problem around the time I started including solos, so there may be some causality there.
My final fix was to just upgrade to the latest version of BIAB, as you wisely suggested.
I think you are right about the computer's health. It has shown other problems since the wife spilled a little coffee on it a year ago. The mouse sometimes sticks in the click position and a few buttons don't work. I have to connect an external keyboard to get full functionality.
Time to budget for a new computer, methinks.