Keyboard and touchpad stopped working. Macbook Air is extremely slow.

NOTE: This report was generated in Safe mode.

> 8GB RAM is limiting. Nothing to be done about that.

> Disable the always-running state of Malwarebytes if it's enabled. Unnecessary. Run the occasional manual scan.

> Disable or uninstall the Fortinet VPN. Typical VPNs are not as secure as they claim and VPNs in general often are implicated in poor performance. Unless required by employer or school or bank, best to disable.

> uTorrent app hang. Uninstall. Torrent apps invite malware.

> Drive write/read speeds are low. (451/481 MB/s) Should be much higher with that SSD. 600s maybe. Consider replacing.

Suggest you get and run DriveDX disk diagnostic against that SSD. Suspect the drive is failing or has some corruption.

Yeah, so the same observations as above with this report.

Note that the drive speeds are reduced on this run.

I suspect the drive is compromised and failing.

The reports indicate TBW is at 182.30 TB written and 596 unsafe shutdowns. While the report still says 100% health on the SSD, I suspect that's inaccurate.

EDIT - I just saw your post re: DriveDX. 👍🏽

Given that info, I'd start by uninstalling the VPN and Malwarebytes, WhatsApp and the uTorrent apps. Then run another Etrecheck eval and see what's reported.

You might also consider reinstall the OS. This can be done without deleting your user data. Simply restart in Recovery mode and select Reinstall macOS. Don't erase or partition or format, just do a reinstall. This will lay down all fresh OS files. Perhaps there's some corruption that needs to be repaired.

If a simple reboot of your Mac doesn’t fix things, see if the problem still happens in safe mode.

How to use safe mode on your Mac - Apple Support 

Safe mode will often correct weird software behavior by forcing the OS to do disk repair, clear caches and other housekeeping and temporarily disables third-party mods. When you're in safe boot, the machine won’t be at its best performance, especially with graphics, but that's expected.

Does the same thing happen while in Safe mode?

You can exit safe mode by restarting your Mac normally, then reevaluate the problem.

Please tell us which Mac, model and year you’re having trouble with.

This could be a hardware issue, logic board perhaps.

What is the startup disk size and type, and how much free space remains?

Also, potentially an issue of conflicting software.

Please run an EtreCheck (free) evaluation of your Mac and post the generated report back here in a reply. EtreCheck is a safe and highly regarded utility from a trusted developer and respected ASC contributor. The diagnostic report will not include any personal info. It simply gathers specifics about hardware performance and installed software that might be in conflict with the OS.

Please navigate to EtreCheck.com to download utility. Be sure to Allow Full Disk Access when you install the app. Once you’ve run the app and created your report please post it with your reply to this message. 

Please note – you must upload the full report. To see how, please click >  How to use Add Text when posting… EtreCheck Report.

We’ll use your EtreCheck report to look for the things that may be causing your problem and advise how to correct them.

If you're so inclined, another thing you could try is installing macOS on an external USB drive and boot from that to see how the Mac performs.

Otherwise, it might be time to schedule a visit to your local Apple Store or tech and have the computer evaluated for hardware repair. It is, after all, eight years old, and the stress of that loooong workday may have done in some critical bit.

You can make a Genius Bar appointment for hardware/software service and support using this link: Contact Apple for support and service - Apple Support

You are aware that this report was generated while the Mac is running in Safe mode?

Reboot normally and run a second report, please.

Also, it's best to enable full disk access to EtreCheck to get the best results.