system
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I don’t see any particular file that is part of the booting process. You have Java, LibreOffice and some temporal files there listed, in addition to the one of HP.
Besides the need to check your system for what’s really going on, you would probably need some repair function from your HP Windows installation discs.
Your system may have also a special boot MBR, and possibly also a special “Factory Default” partition. So, when you seek for help, you should mention the exact model, and add the information about how your system is partitioned.
Be aware that “Factory Default”, if exists, would delete your data too, so a backup is in place, probably before anything else. For the backup, you could use your Ubuntu and some external media (CD/DVD/UFD/other).
There is also the possibility that only your MBR boot code was affected and restoring / repairing it would be enough to boot your system again, but anyway keep in mind that further scans are necessary to find out the original source of the problem.
Start a new topic in the “Viruses and Worms” subforum here in Avast. You may add there a link to this topic if you want.