Acer veriton 5000 pentium4 1.7mhz 2Gb ram. double booted with win2k
I had no trouble upgrading from Ubuntu 8.04 to 9.04. For some reason 9.04 would not upgrade to 9.10 so I installed from disc, with minor hics. Now works well but randomly hangs with no warning and I have to switch-off and restart to continue. Very annoying. I do not get any error alert it just hangs and when rebooted carries on quite unperturbed. How do I fix??
Since writing the above I reinstalled from a newly burnt disc but the problem persists HELP PLEASE


Additional info.
on booting in recovery mode got following::
754677 Render error detected eir??????

Anything in syslog

What about the other logs.

dmesg
/var/log/messages
/var/log/faillog (maybe blank)

SOLVEDReinstalled 8.04 THANKS ALL