Well i'm using VMWorkstation 6.5 on windows vista. I've installed 2 Centos with different configuration settings and 2 Windows Server 2003 on VM which were working very fine earlier. Now Windows Server 2003 VMs are working normally but suddenly my Centos VMs became too slow. I've to wait for ages first to get them booted, then their response time is too high. I can't understand that suddenly what happened. initially i thought i've used my hard disk space on the drives where images are placed, now after freeing space on hard disk, still Centos is working very slow while windwos server 2003 is behaving normally. What could be the reason for that?