system
6
How much memory do you have on that system? Try to remove registry HKEY_LOCAL_MACHINE\Software\Alwil Software, and delete avast4 folder on both disks if they still exists. You may also try increasing size of swap file in Control Panel - System - Performance - Virtual memory. Set minimum and maximum size to e.g. 256 MB, restart and start setup again. Then you can set virtual memory size to default value.