I have windows xp home.  I have 2 user accounts on the computer.  The 2 accounts have administrator access

Account “A” does not have a password.  I have Microsoft AntiSpyware on account “A”.  Account “B” has a password.  I tried to run Microsoft AntiSpyware on “B” it poped up the error message “Unexpected error, quitting.” And did not run.  When I set up the 2 accounts I have it so if I’m on account “B” I can access everying on account “A” and if I’m on account “A” I cannot access anything on accont “B”.  When I tried to install Microsoft AntiSpyware on account “B” it poped up the error message “Error 1904.Module C\Program Files\Microsoft AntiSpyware\gcAntiSpywareLibrary.dll failed to register.  HRESULT -2147220473.  Contact your suppor personnel.”  The next error message was “Error 1904.Module C\Program Files\Microsoft AntiSpyware\gcASPrivacyLib.dll failed to register.  HRESULT -2147220473.  Contact your suppor personnel.”  How can I make Microsoft AntiSpyware work on account “B” Help anyone?  Please email me at light9boldt@aol.com Thank you.