@ Roberta
I had been experiencing the symptoms described below in all of the Registry Cleaner runs. Then I did a certain edit of Windows.dat and all the symptoms went away (so far anyway). It may be a workaround when, or if, the symptoms return. I have no idea why it worked, but hope it works for you. 8)
The edit:
1. Before starting PowerTools, make a copy of C:\Program Files\jv16 PowerTools 2008\Settings\Windows.dat somewhere.
2. Use notepad to remove and the five lines below it from C:\Program Files\jv16 PowerTools 2008\Settings\Windows.dat.
3. Start PowerTools and Registry Cleaner. The window will have reverted to the default sizing, but should be resizable.
The removed lines:
Height=616
Width=913
Left=206
Top=50
Max=False
The symptoms:
1. Columns would not sort (clicked column buttons depressed and stayed depressed).
2. Columns could not be drag-resized.
3. Caption area drag-select did not work.
4. The results window could not be drag-resized.
5. The results window could not be moved using the title bar.
6. Closing the message box made symptoms 1, 2, and 3 go away, but 4 and 5 persisted.