The driver we had been using was for HP laserjet 2100 PCL6, though the printer says on the front HP laserjet 2100 TN.
It finally occurred to me, as the only change here is automatic Win7 updates, that my driver is the problem. Going to HP I find drivers for HP laserjet 2100 PCL6, PCL5, and all-purpose PS driver. Nothing for the HP laserjet 2100 TN. I've tried them all and they produce "error" when I try to run a doc to the printer using them.
Is this printer so old that it is no longer supported by HP? Or no longer supported for Win7 64 bit? I hesitate to use one of those download and pay scanner softward packages, as if HP does not provide a driver, I would pay and not get the issue resolved.
Thanks for your thoughts on this.