Computer Learning

[been there]

Good Day to all. Have a computer down and it was put aside
because of priority issues. And now I can hardly remember
all that's needed to describe malfunction details.

However,it was ME that caused this (was changing some settings).

Anyway, here goes-

Cannot connect to internet (error 105, I believe).

And I do remember that there was a warning
that a certain setting manipulation could cause trouble.

It is an HP computer with Windows 7 (home premium, I believe)...
has lots of RAM and Hard Drive capacity and great speed; have Spectrum cable hook-up.

Will not get back in front of this thing for about another week.

Would (as always) appreciate any help.