I tried to install 13.04 after downloading and burning on a boot disc, or 12.04 from a disc from a magazine over windows 7 on a netbook but got the following code
an error occurred, please run Package Manager from the right click menu or apt-get in a terminal to see what is wrong.
The error message was
Error opening the cache(E:read error - read (5:input/output error), E the Package lists or status file could not be parsed or opened)
When I open 13.04 I get a message
disk drive for /tmp not ready
once the system has final booted up a number of software items don't run and it varies from time to time which don't.