(1) Which antivirus scanner did you uninstall? There may be a utility at its site to be more thorough with that. Did Windows Defender turn on automatically? That's all one needs.
(2) What camera icon disappeared? I hope not the ones in Device Manager...

That should have returned with a reboot as Patricia said. And the driver is entirely Microsoft for my Dell. I think that is true for your MSI as well since there is no download for it at your site. It gets a version number that is the same as the installed
version of Windows.
(3) I see your version of Windows is 1803 (10.0.17134). After updating BIOS, other firmware, & all drivers at the Apache site, consider upgrading to 1809. Do you have a digital license at "START, Settings, Update & Security, Activation"...?...

(4) Well, when ready, start with your VGA driver(s). What do you see under Display Adapters in Device Manager? Is there an Intel device as well as an Nvidia device? Your site has these offerings...

(a) Update the Nvidia driver, if necessary, first trying with the Device Manager Update button (search automatically). If that fails to get it, take it from the site. That one needs to be updated with
BIOS. I'm not sure it needs to be first, but seems safer that way.
(b) Update the Intel driver only if it already shows up in Device Manager.
(c) Now click the BIOS tab at the site, & update your BIOS.
(d) I think I would take what is at the Firmware tab, especially if the date is later than the purchase date of your computer...

Edit: I think I still would want to do it, but see whether this sounds scary...
https://www.msi.com/files/pdf/EC_Firmware_Update_SOP_for_Windows_EN.pdf
EC Firmware Update Instruction Windows mode
(e) Return to the Driver tab, & update the rest of the drivers, if necessary.
Good luck, & keep us informed.