Wtf, my computer?

Hey everyone, my laptop's relatively fast.. If I open up Runescape and play it, it runs perfect.. but as soon as I open up another tab, say youtube to play music, runescape lags right away and logs me out. Even if I open facebook, and search around, I'll lag out.. I don't understand?

 

RS is lagging lately since the nuke, but it's strange it runs fine and then lags to hell when you open another tab.

What browser are you using?
And have you tried updating/reinstalling Java?

 

Mozilla Firefox, and no, I could try this.. but even when I use the one that you download (not on the internet browser) the same thing happens.. :/

 

try chrome it seems to run better.

 

ok, was there a time when it didn't do this? Or has it always done it?

 

It is because your computer cannot cope from the load. It either seems that the RAM is being bottlenecked or the CPU.

Please provide specs of your RAM and CPU

Also try closing unneccesary programs in Task Manager under processors. If you can't distinguish between neccessary and unnecessary programs I suggest you download Game Booster Pro v3 Beta and install that program, click boost and it will close unneccesary programs freeing up RAM.

Also download CCleaner and run a scan, then click ok, ok, and delete the useless junk sitting on your computer. It deletes useless stuff like temp files and internet history