I have a problem with AutoCAD LT 2013 SP1.1 on an Windows XP SP3 (2 GB RAM).
The autosave function lock AutoCAD for some seconds on a small drawing.
In a big drawing ACAD still blocked for long long time.
I try to:
- Empty out the temp directory under user profile;
- Esclude *.ac$, tmp and bak to scanning by antivirus (also the temp directory);
- Tunr off any protection by AV;
- Disable automatically "make a bak files at autosave".
Autosave does that: it doesn't help your system is on the low end as well. Set AutoSAVE to a longer time setting and get in the habit of manually saving more frequently. A better more curent system and WIndows version would help you see less of an impact as well.
Never EVER turn of BAK file creation, you will regret this one day: turn that back on please.