What actions and parameters of the PC should be monitored by the user?

Question

Monitoring

What actions and parameters of the PC should be monitored by the user?

Answer 1

I do not do this, because I do not need it
https://toster.ru/help/rules
5.11

Answer 2

I think it would be useful to observe:
1. Disk space
2. Whether the antivirus database is updated, whether it works at all.
3. What kind of programs does the user have. Are there any trojans, games for a dozen gigs .. and other garbage.
As in Zabbix, I don’t know, in other inventories there is a function for tracking the installation of prog. (The program was installed - an alert for soap)
4. Is it hard to pour, judging by the SMART indicators.