Share Point & CRM

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OK, I have messed up & broken something big time!
I need some help Please.

I installed CRM & have consequently remove it.
However now my companyweb is no longer available & I am getting 'page cannot
be displayed' everywhere.
I am now getting the std welcome page with the 4 options but cannot access
the 'My Company's Internal Web Site' or 'Remote Web Workspace' pages.
I have other areas that nolonger are accessible from server management
(monitoring, backup)

I am thinking that this is to do with the CRM changing some of the share
point details but I am really new to all this & have obviously done something
wrong.

Can anybody point me in the right direction or maybe advise if it is
possible to reset back to defaults?
.