(1) Good news you don't get blue screens often & can plausibly explain the few you've had. Otherwise, the gurus quickly would descend from circling above to put you knee deep in core dumps & at risk of puncturing a toe on a Phillips screwdriver or screw.
(2) Many apps, including Windows apps, will secretly start a service/whatever at boot. The best way to see all of that is to take...
https://docs.microsoft.com/en-us/sysinternals/downloads/autoruns
Autoruns for Windows v13.96
It will show everything that starts up from every possible startup location, & it can disable/reenable or even remove them. Also, it can submit them to VirusTotal for a multi-antivirus scan.
(3) PowerDVD14 appears to be a 3rd-party Windows Media Player (WMP). Did you install it yourself, or did it sneak in? Do you use it a lot? WMP is still there (type Media into Search), & there also is Grove Music (type Grove). I don't use them much.
If the other two will do as well, uninstall PowerDVD14 at "START, Settings, Apps". Otherwise, un/re-install it &/or upgrade it to PowerDVD20.
That is excellent that you are investigating those red X's.
(4) "I have 64-bit and 32-bit on my pc"
AT "START, Settings, System, About", I expect your System Type looks just like mine...

We have an x64-based processor, & a 64-bit version of Windows was installed on it. Therefore, we may install & run both 64- & 32-bit apps. Most 32-bit apps will be installed into the C:\ Program Files (x86) folder.
Autoruns, above, doesn't require a formal installation. But it has a 32- & a 64-bit version. Either will run for us. It downloads as "Autoruns.zip". Extract it to a folder of your choice...

Both versions are inside. Put a shortcut to Autoruns64.exe onto the Desktop to run the 64-bit version. Then you may then set the shortcut to automatically run as an Administrator to avoid its pesky question each time you run it.
(4) "we lost power several times"
That can't be any good. Better get a UPS (Uninterrupted Power Supply)…
https://www.amazon.com/Computer-Uninterruptible-Power-Supply-Units/b?node=764572
Amazon's UPS offerings
I used one for many years on a desktop computer, & it saved me several times.