Microwave?

My microwave is twenty seven years old.  I use and the kids abuse it.  It cooks everything and reheats everything.  We especially love making popcorn in it.  Mckee makes her own popcorn now.  She asks me what to put it on and away she goes.  It's great.  Only now it is starting to burn things especially my popcorn.  Mckee isn't impressed either when hers burns.  Yes, we have a good laugh on it but we still aren't happy.  This is really getting bad.  I thought maybe it was the type of popcorn.  All brands were burning.  Do I have to go out and get a new one?  Yes, I must break down.  I put it off long enough.  Today is the day.  Armed with a type I want off we go.  Now I have put some thought into this, but not too much.  Into the store we go.  I was looking at the over the stove ones, they were really nice, not too pricey, maybe.  They have a light and they vent the stove.  It would give me more space.  Bob looked at them and thought that they were too big.  Nope, they will fit, I measured.  Then I talked with the sales lady.  You must have it installed, that will cost $140.  That made my mind up to go and get one, put it on the counter and call it quits.  On the way home Bob said I did the right thing because Mckee likes to cook independently and she wouldn't reach it, but looking later I wouldn't have either.  Oh well, I came home with a new microwave and all I have to do is open the box and put it on the counter.  Tea anyone?.....