Unable to backup and Duplicate Folders

I have Vista Premium Installed on Drive C. It lists folders under
user/username/ such as desktop, documents, favorites etc. but no duplicate
folders there. I also have a second drive, New Volume (L) that I use
for backups and some program installations. It also lists the same folders
under user/username/ but there are two folders for each i.e. 2 desktop, 2
documents, 2 downloads, 2 favorites, 2 links, etc. So I have a total of
three like folders on my PC It also has six folders with no names and seem
to be empty but when I delete one or all, my icons disappear from the
desktop. I restored them and now I am afraid to delete any of the
duplicates fearing I might crash my computer. I don't know how this
happened or what I did wrong. I am 71 years old and not very technically
inclined. I would appreciate any help.
I have a snap shot of my desktop if anyone would like to see it. I can
email it to you. Thanks ()
Problem #2 I cannot make a backup. I get the error " A shadow copy could
not be created for the
following reason" Access Denied 0x80070005. I Tried to Restore to a
time when backup worked but no restore point. I tried to get into the group
policy to make a restore point but it is not available in premium. ???
don't know why. Checked google but error 0x80070005 seems to cover just
about every problem there is. So Now what? I'm to old to punt.