Recently I purchased old version of cubase for my G3 running Mac os 9 . I read in cubase installing guide that virtual memory should be turned off before running cubase. So, I went to memory control panel and turned virtual memory off. Then I restart computer. Mac powered up, monitor lit up, I saw usual "starting up" but few seconds later on monitor appeared white rectangle with black bomb pictured on left side. Mac doesn't correspondning anymore with keyboard, mouse clicks...Is this kind of system crush? What should I do? Please, help! Thanks in advance .