Process 1                    |      Process 2
|------------------------------|---------------------------------|
|                              |                                 |
| write "batch 1" to a file F  |                                 |
| starts "batch 1"             |                                 |
|                              |                                 |
T                              | * Notices generic popup         |  
I                              | * Reads "batch 1" from file F   |
M                              | * writes to a log file etc      |
E                              | * Ignores popup until F changes |
|                              | * Aborts system shutdown        | 
|                              |                                 |
| batch 1 finishes             |                                 |
| write "batch 2" to F         |                                 |
| start "batch 2"              |                                 |
|                              | * (no popups detected)          |
|                              | * detects and aborts sys shtdn  |
| batch 2 finishes             |                                 |
|                              |                                 |
| ...etc                       |                                 | 
V