Running Vista Home Basic in an HP-a6130a desktop with plenty of resources, I get a start-up error:

Imgicom.exe Entry Point Not Found/Procedure entry point/Getfile InfoVersionA could not be located in Version.dll.

Microsoft support want to charge me $80 to get rid of this, which I don't want to spend. Any suggestions?

Welcome to PCHF.

Imgicom.exe is a process which is installed alongside Iomega Zip Drives.
I suspect you have a support CD that was not completely installed.

My first suggestion would be to reinstall the drive's support software with the drive connected.

Also, with the drive connected, you can check your Device Manager.
Open your Device Manager.
Click on View ... Show hidden devices

Click on and Delete (with the Delete key) any devices that have a ? or ! in front of them.
If the Device Manager has an "Other" device category, open it and Delete any devices in the "Other" category.
Now, reboot.

The reboot will force Windows to refind the deleted devices and hopefully see them for what they are.
After rebooting, give Windows time to locate and properly install the deleted devices.

Go to the Device Manager and verify that all your devices are listed correctly.