It's behaving just like my sister's system did. We opened it up, and whew, was there alot of dirst and dust in there. Cleaned it out well and the fan returned to normal.
Same here. I thought I had cleaned it pretty good but still found a lot more debris in the heat sink and in the front panel. The fan is running at what I would call normal right now and the temp. is 36° C.
Thanks for responses everyone,