I've happily been using the Sony Reader for PC with my PRS-T1 with Windows 7 but since yesterday when I've attempted to sync my reader with my computer it crashes with the following error message:

[Window Title]

Reader for PC

[Main Instruction]

Reader for PC has stopped working

[Content]

A problem caused the program to stop working correctly. Windows will close the program and notify you if a solution is available.

[Close program]