Suffice to say that thousands of words have been written about the subject of FSX freezing Randomly! It has taken me 18 months to find a solution including about 15 months corresponding with Microsoft without success. I even considered replacing my 6 year old 32bit, P4 - 3.2 PC, but I'm glad that I didn't! I found the solution, installed it, ran FSX ok, removed it and FSX, and reinstalled FSX and the same problem appeared again! I then reinstalled the solution or 'Fix', and I have been enjoying many hours with FSX trouble free! So, here is where I found the 'Fix'.....http://simviation.com/1/search?submit=1&keywords=uiatomationcore&categoryyld Here is the 'Fix',....http://simviation.com/1/download-file?file=FSX_fix.zip&fileld=5112 Here are my comments to Microsoft......http://205.252.250.2...=1310153984/0#7 Even after finding the solution, I've often to see others continue down the road of great expense of replacing hardware etc.!!! I guess people will only see what they want to see and will do what they want to do, no matter what! Thanks and enjoy FSX.......as I now do!