Small Engines (Lawn Mowers, etc.): Craftsman 2-Stage 9Hp Snow Blower

Question
I was using my 9Hp 2-Stage Craftsman snow blower (~10 years old, looks new)last weekend.  The weather was mid-20's and dry, approx. 4 inches of new snow. Blower has power drive. I ran and shut-off the equipment four to five times without issue during the day using the electric start.  No unusual sounds or performance.  The last time I shut it down and went to restart approximately 1/2 hr later.  The electric start sounded as if it was "disengaged".  This disengagement sound also can occur when the equipment is having a hard time starting, as if its trying to save the starter from burning up.  I just have to wait a minute or two to retry.  As several attempts to start with the electric start were fruitless, I went for the pull start cord.  It was completely frozen.  Will not budge, even after days in a relatively warm garage.  First thought was the oil (seize-up), however, its not the cleanest, but it is full.  Any thoughts/experience?  Will most likely take it to Sears and have to shovel awaiting their not so fast turnaround.  If the engine is seized, probably means new equipment. Thank you in advance for your time and input.

Answer
Remove the spark plug and try to pull string.  If you can't pull the string with the spark plug removed, then remove the starter cover / engine cover to access and inspect the electric starter.

Try to turn the flywheel by hand.  If you still can't rotate the engine, by hand and with the spark plug removed, then make sure there is nothing binding on the rear pulley.

Have you brought the blower inside a garage that is above freezing so it can de-thaw?

Eric