audio service is not running? can you hear sound then?
In "Services" you can disable the following:
Fax
Windows event log (Unless you want this running)
Task Scheduler
Windows error reporting service
Windows defender (i disable this,its useless anyway)
Perental controls
And to upgrade your ram you would need to open the back of the laptop up,usualy a little plastic bay and you can access the ram from there.
2Gb would be best.