Do you have Adobe reader (or the complete version) installed?
Do you have JVM (Java Virtual Machine) installed?
If you answer no to both of them than the log is clean.
If you answer yes to one of them, there is something wrong.
Any suggestions how to keep this from happening again
1] Keep your system (and the applications) up-to-date.
2] Be carefull with what websites you visit.
3] Be carfull with what you download/install.
4] Read the manual/help on applications so you know how to handle them (especially the ones related to security)
5] Only use a a administrator account when needed.
6] Read
THIS WEBSITE. It has a lot of usefull info about security settings.
7] Visit
THIS WEBSITE. It has a lot of other usefull info for Windows XP/2x users.
8] Keep in mind that security start with the user. What you know and do is like the ground you build a house on. If the ground isn't good, the house will not be strong.