Do you get any error messages when this happens? Are these archived checks, that have had a previous check No. posted to them?

First, make sure you have a good backup, then perform a Data Integrity Check through QCWIN (File | Data Integrity Check). If it finds errors, perform a 'Rebuild', then do another DIC to make sure it got all the errors.

If this does not fix the problem, then try removing the QCWIN directory and reinstall QCWIN.

We would need more specific details if you are still having problems, when did this start happening, for example - what has changed on your system or the network?

Regards