Hi,
I agree with deggers. MSE is good but there are other free alternatives and Comodo's is best according to this indepenent site:
http://www.matousec.c...llenge-64/results.php
The level of detail this guy goes to is far deeper than any I've ever seen, in professional magazines. Notice Mcafee is utter rubbish as is most other commercial software. Outpost is free and briliant, but Comodo is even better :).
Certainly do NOT reinstall Windows or go to a professional just on the grounds MSE is orange. It only means the update has failed not that your machine is infected.
Mike