Recently there has been a major BDIS update and I have noticed a considerable slowdown with adobe reader X.
Before your recent major update there was no problem and there has been no adobe reader updates before or after your update.
This is not a singular pc slowdown, it also occurs on other computers I personally manage with BDIS installed.
Please investigate.
Computers managed:
Windows XP SP3
Intel P4 Processors 3GHz or more
1GB RAM or more