I doubt the problem is related to the files mentioned as they aren't active until the system is up and running and you aren't getting there or are you able to boot ?
If you weren't able to boot I would have thought it would be a problem with the MBR (Master Boot Record), if you are able to boot into command mode, does it recognise the drives ?
The C:\System Volume Information folder (or other drive letter, D:\, etc.) is a part of the system restore function and as such is protected by windows, the only really effective way to clean infected _restore points is to disable system restore and reboot. This will clear ALL _restore points. Once you have disabled system restore, reboot, scan your PC again and if clear enable system restore. This obviously won't work with this drive in a different computer,but avast should have been able to move it to the chest, etc.
We are seeing more detections on the pagefile.sys and I can't understand why as I thought that it was excluded from scans.
Add ?:\pagefile.sys to the exclusion lists as and when it is in the normal system (the ? is a wildcard so it works if you have the pagefile.sys in more than one drive):
Standard Shield, Customize, Advanced, Add and
Program Settings, Exclusions