Thanks for your explanations, jphughan. Maybe that finally I will stay with a new 64-bit system to avoid such difficulties. But would the following be a (technically) feasible procedure? 1. I buy a new PC (64-bit) and create immediately an image of its disk (that means before installing or changing anything) ("Image 1"). 2. I transfer (on a trial basis) my old 32-bit system to the new PC by using the feature "ReDeploy Restored Image to new hardware" of Macrium's Home Edition (--> the bare metal restore). If then all works fine I stay with this solution. If problems arise (e.g. as described in your posting) I go to step 3: 3. I restore "Image 1" bringing back the new PC in its original condition (and afterwards I set up all my programs etc. from scratch within the 64-bit system). And a second question: Is my assumption correct that an image created of a 32-bit system is of no use in case that I want to continue with a 64-bit system? Or are there any parts (or whatever) of the image which could be useful when performing the setup of the 64-bit system?