[Dell desktop Dell Inspiron 560 4GB RAM; high speed cable; MS Win10
64bit; Windows Live Mail 2012(awful!!!); MS Word Pro 2003; Mozilla Firefox; Avast AV; Windows Media Player; Adobe Reader; Adobe flash Player]

I receive the following message too frequently and wish to inquire inquire just what it is, who is responsible, and what to do to stop its frequency or get rid altogether. It causes my cursor to GO zigzag or too slow and freezes my computer no matter which of its 3 buttons I click on. When I open the link below it says: “File not found”.... I opened the debugger but didn't know what to do with it...

I see now the link contains the name "javascript". I wonder if it has to do with my having, under Programs & Features, Java 8’s Updates: 31, 40, 45, & 60. The last one probably the latest? And should I delete the FORMER 3 updates? Here’s that message:
Quote

Warning- Unresponsive Script:

A script on this page may be busy, or it may have stopped responding. You can stop the script now, open the script in the debugger, or let the script continue.

Script:

Continue Debug Script Stop Script