Wierd Problem-- Too Many Accounts

Today i noticed some folders in the "Documents & Settings" folder, but these dont occur in the "Welcome Window"

there are three new USER ACCOUNT names in the "Documents & Settings" folder, they are---

=>Administrator.YOUR-ABB2E4D9A7.000 => Last modified-"March 6th"

=>Administrator.YOUR-ABB2E4D9A7 => Last Modified => "Yesterday May 16th 7:16 PM"

=>Owner => Last Modified - "February 24th"

I don't Know when these got created. Currently My PC has Two Administrator Accounts (one Factory Created
& the other created by me), their names---

=>HP Owner
=>Most Wanted

The other accounts folder ( which are system made [i think])
=>All Users
=>Administrator
=>Default User

Is it because of a virus these folders got created?

so can i delete the other three account folders mentioned first.

My PC Config--

HP Pavilion, XP Home Edition SP 2 , 256MB RAM

did u install windows xp over a previous installation ?

NO, i did not Reinstall XP, but i had done the SYSTEM RESTORE two times (of one, which was not successful),

so this is the problem, CAN i DELETE the three accounts SAFELY???

of all these accounts which are made by the SYSTEM???

check the "last modified date" of the users

i've given the "last modified" date on my main Question.