enabling applets

When I turned my computer on this morning, my java applets loaded just fine. Now, however, they will not load at all. What do I do?!
[139 byte] By [generalta] at [2007-11-26 15:18:26]
# 1
Undo whatever changed. Use System Restore if using Windows XP.
ChuckBinga at 2007-7-8 11:01:13 > top of Java-index,Desktop,Core GUI APIs...