Whats the reoson for no antivirus or firewall?
Please run a scan with HijackThis and check the following lines for removal:
O2 - BHO: (no name) - {e2b5eb5a-f5ee-4bbc-bb0d-7ce338b19f83} - C:\WINDOWS\system32\jspdex.dll (file missing)
O20 - Winlogon Notify: jspdex - jspdex.dll (file missing)
Now close ALL other open windows except for HijackThis and hit FIX CHECKED. Exit HijackThis.