mac 10.5.8 is running slow and programs are disappearing
Hi guys,
I actually have more than one problem with my Mac:
For one it is running slow especially when using Firefox and Office at the same time often resulting in me having to force quit the programs because they are not responding.
Lately applications are disappearing. First Stickies which is really! bad, because, stupid as I am, I put important info on them and did not make a backup. I tried to restore them via Time Machine but find nothing under ~Library/.StickiesDatabase, ...Application Support... or ...Preferences/com.apple.Stickies.plist
Then Preview disappeared which, luckily i could restore via Time Machine.
And now iCal looks different in dock (the white square surrounding the actual date disappeared) so I am guessing this soon will be gone as well.
Another info that probably is important: my battery is swollen so generally I use the Mac without the battery
Do you think this is a virus? Or maybe 10.5.8. is just too old a version? Do you think an upgrade to at least 10.6. would help or rather worsen things? And is it worth it to invest in an upgrade, a new battery, a complete check-up or should I just wait until the poor thing dies and get a new one (which would be really painful)?
As you can see I am a clueless user, and I am sorry for any stupid questions in advance and thankful for any support!
MacBook, Mac OS X (10.5.8)