Malwarebytes detected many "Rootkit.0access" files

[Bill10576]

About a week or so ago, I ran a full scan through Malwarebytes. It's a common practice, I like to make sure things are okay. However, on this particular scan, Malwarebytes detected roughly 11,646 files. I was shocked, every single one of these looking like the following:

C:\Windows\Installer\{3d8840f8-2cbe-08c5-deb6-78532352557a}\U\trz1061.tmp (Rootkit.0Access)

I did a little research, and read some nasty things about "Rootkits", panicked, and had all the files deleted. Did I cause harm to my computer? Thinking back on the incident, that seems like quite a lot of files to have been infected/deleted. I ask this question, because a few programs on my computer aren't functioning the way that they should since I did this.

For example, Microsoft Office Starter will not allow me to use/read any documents. I get the error "WINWORDC.EXE has stopped working." Over and over again. Many days looking for a specific fix for that has failed, so I was wondering if it may have had anything to do with the deletion of all those "infected" files that Malwarebytes had detected.

Also

Every attempt to check the 'Quarantine' tab from the interface, results in a crash of the program. Related in any way possibly? I'm hoping there may be some way to resolve all these issues. Thanks in advance.

[AdvancedSetup]

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