Re-install XP Home

[Waldo]

Following the rift between Microsoft and Sun Microsystems
in re. Java, I deleted a (poorly performing) applet
application from a web site and all of the Java files
downloaded/installed in my computer -- but must have
deleted some MS Java things too. Question is: can I
reinstall XP Home from the CD to fix the problem, or will
I create more problems in doing this?

Thanks.