Hello Robert,

I need more details in order to help you. Do you receive any error messages? if you o, could you please add a screenshot? Are you using your program as administrator? Please right click on the program icon, then select ''use as administrator'' then start your program and let me know. Did you change anything in your computer?
Please give me all the information you can.
Thank you!
Samantha

Hello Samantha, I've selected "use as administrator" and the problem persists. This happens on both my main PC and laptop, and only since I upgraded to 10. I deleted NET 4, cleaned per suggested procedure in this forum and re-installed it - there was no improvement. Most crashes happen when previewing although it also happens whilst editing. As I said, this happens only since I upgraded to 10. Thanks Rob

Hello Samantha, pleae find attached a screen shot of preview crashing. Regards Rob

Hi Robert,

Please try to use this cleanup tool http://cid-27e6a35d1a492af7.skydrive.live.com/self.aspx/Blog_Tools/dotnetfx_cleanup_tool.zip then install the .NET Framework 4.0 from the following link: http://www.microsoft.com/en-us/download/details.aspx?id=17718

Once this has been done, please try to reinstall the program and let me know if you still have the same issue.
Thanks!