You have done the right thing, 'first do no harm' don't delete, send virus to the chest and investigate.
There is no rush to delete anything from the chest, a protected area where it can do no harm. Anything that you send to the chest you should leave there for a few weeks. If after that time you have suffered no adverse effects from moving these to the chest, scan them again (inside the chest) and if they are still detected as viruses, delete them.
It is almost impossible to say where these came from, other than if they are in the system volume information restore points they were removed from windows system folders at some point (for some reason) and system restore saves them as a restore point in case you made an error and wish to restore them at some point.
It may be best if your system is clean to Create a Clean Restore Point - Clear old Restore Points. So you will know your system restore points aren't going to bite you if you use it in the future.
Now you are clear of infection create a clean System Restore point:
1. Click Start, All Programs, Accessories, System tools, System Restore.
2. In the pop-up that appears fill in the radio button to Create a Restore Point
3. Click NEXT
4. Enter a useful name that you will remember if you need to find this again (Clean Restore Point)
5. Click CREATE
You now have a clean restore point, you should clear the old ones:
1. Click Start, All Programs, Accessories, System tools, Disk Clean Up
2. Click OK on the C: drive
3. Click the More Options tab
4. In the System Restore section click the Clean Up button