Remove Services that you don't need
From MEPIS Documentation Wiki
It's a good idea to remove services that start at boot time and you don't need (for security reasons and to limit resources utilization)
For example to stop spamassassin from starting, execute this command as root:
update-rc.d -f spamassassin remove
Another way to manage services is to use KSysV to edit MEPIS runlevels (apt-get install ksysv).
List of services that you might not need:
- spamassassin - e-mail filter
- hpoj - HP Office Jet printer driver (if you don't have HP printer)
- cupsys - Common UNIX Printing System(tm) (if you don't have a printer)
- ntpdate - set system time from NTP servers
More info about other Linux services here and here also here
For KDE 4 (Mepis 8.5 and up)
- use System Settings --> Advanced tab --> Service Manager and disable any services you think you don't need. (Most are needed)