Cannot load programs or install programs including updates

>-----Original Message-----
>I cannot get several programs I have been using to load,
>the first one that failed to load comes up and I get the
>following message.
>
>Tool Number of Tool not specified or invalid. To set

>number use keyword tool number in section {Tools} of INI
>file.
>
> Four other programs have stopped loading up, no

>
> McAfee firewall will not start.
> Virus scan will not load, message is , Failed to Load
>McPal DLLS.
>
>I have run system recovery, did not help at all. Cannot
>install programs including microsoft updates.
>
>
>All of this started quite suddenly, no idea what caused
>it.
>
>Please help!!!!
>
>Barbara
>.
>