My wife bought a brand new Tashiba notebook from bestbuy, It had so much junk on it (duplicate third party programs that did the same thing that Vista did itself). I spent hours removing all the junk programs, defraging it- Afterwords, when I ran sfc scannow, it showed errors.
Most was caused by the third party/toshiba programs being removed (the registry was still full of crapware). You have to understand the O/S on a system like this is not installed from a true Vista DVD disk, but is a OEM "model" image used by them on all the systems using that operating system (i.e., Premium), usually taken off another master. Any errors on that master are copied to every system using the OEM recovery Image disk. The best way to fix this is to re-install Vista from a true Vista installation disk- there is no junkware (crapware) and the install is clean.
Now if there are hardware issues, then I would take it back and demand a refund. Do not get stuck in the "repair/warranty" catch22 on a new system. The turn around for repairs can take months, and it is a common practice to use refurbished/used parts to repair the "new" system with.