HP deskjet 940c AND officejet d145--- conflict?

[Unfaithful]

ERROR message when attempting to install 940c software:

"Hewlett-Packard Printer Assistant Browser has encountered a problem and needs to close."

WITHOUT the 940C software (Toolbox); I canNOT, align printer heads, clean printer heads OR--- check ink level. :-(

OS: W-XP Pro SP2
Port: USB--- 2.0 on both.

Any resolution? If not: a standalone program that will accomplish this?

Thanks.

BTW: I am NOT a "Technical User"; I am simply a user and there was--- no category for my 'class'.