I unchecked the “Included in Drafts” box in all the documents in the Research folder, and saved the project, but after quitting Scrivener and opening it again, I found that box is checked again.
Same thing happened to me.
AMD Athlon™ Dual-Core Processor
3 GB RAM
There’s another thread about this here:
If you want to compare details with others who’ve had the same problem.