Having got a bit fed up, I’ve now completely wiped the 2nd drive using Killdisk. It doesn’t show up in My Computer, and shows up in Disk Management as ‘not allocated’ and ‘not initialized’. When I open Disk management, the ‘Initialize and Convert Wizard’ opens.

With it in this state, Avast works perfectly.

Since my last post, I have also found that AdAware SE also freezes during scanning - it shows up in Task Manager as ‘not responding’ and then starts again, freezes again, and finally gets through the scan. I ran Kaspersky online scan, and this also froze! All other scanners work, I’ve run them all, and I’ve tried pretty-well every other program on the PC and nothing else seems affected.

Since wiping the drive has solved all the problems, I can only think that I’m doing something wrong when installing the HDD.

Any help anyone can give would be very much appreciated. I know this isn’t a general knowledge Forum, but I would very much like the 2nd drive, and certainly don’t want to be without Avast!

Thanks,

Graham.