Hi, Carrie,
Are you doing anything in particular each time your computer freezes? printing a specific report? posting? ? Do you receive any error messages of any kind?
Please make sure you do a backup prior to posting any batches (and daily) and to check your data integrity any time this happens (File | Data Integrity Check).
It would be a good idea to have your network tech come in and check your network connections, ensuring your network interface card is seating securely, etc..
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Regards,
Softrak Tech Support