Multiple instances of svchost.exe and iexplore.exe are totally normal. If you would only have 1 instance of svchost.exe running (for example), you would have a lot of problems as svchost manages many services which are required to run Windows properly.
As for iexplore.exe, this is also normal. This was introduced since IE7. This is because of the IE Tabs feature and crash recovery.
ccsvchst.exe is a part of your Norton.
There's no malware present here, nothing strange/suspicious in your log. The "being slow" and crashes may be because of Norton, because Norton is known to cause this behavior on some systems. To troubleshoo, temporary uninstall Norton, then reboot and see if your Windows behaves better. You can always reinstall Norton again if that didn't solve the problem. If your Windows is behaving faster with Norton uninstalled, it's maybe time for another Antivirus alternative.
Also see here for slow computers: Help! My computer is slow!