Runescape errors?

My best suggestion to you is try uninstalling java from the control p > add / remove software. Once you do that go back to www.java.com and download the NEWEST java build. This should help fix your problem. I would also recommend installing adobe flash and shockwave. There was a new java build that came out last month and Runescape uses the latest java build. If you aren't updated u may experience this problem.