Connection slow or not working

We had our Wildblue satellite installed April 2007 and nothing worked right.  After numerous calls, the retailer installed the entire system again.  After that, speeds were slower than dial up and it wouldn't stay connected.  They installed another modem and that helped but we still lost connection at least 6 times a day.  Numerous tech's from DishNetwork/Wildblue have been here doing different things.  Our speeds are better on upload and download but opening web sites is still the same as dial up.  Now, every evening between 7:00-11:00 pm it's impossible to use our pc because nothing will open, no incoming or outgoing email.  Hughes sends a tech during the day when everything is working ok but won't send one in the evenings when the problem occurs so they say nothing is wrong.  I even had all 3 of our pc's checked by a certified tech because they said it was our pc's.  Nothing was found wrong with any of the pc's.  This is the 9th day of not being able to use our pc's in the evening.  Does anyone have any idea of what could be wrong????  Thank you.

They have installed the entire system twice, realigned the dish again two days, ago and we have had only one pc connected for over a month.  The numbers are ok during the day, the problem is from 7 pm to 11 pm every night.  No tech has ever left the numbers but I will call tonight when I can't use my pc for anything and get the numbers.  I think it's a crowded Gateway because they over-sold.  Thanks for your reply.

I had trouble with my beam location as well. It would come on and then go off for no reason. I had to get onto tech support so many times that it was unbelievable.