Using an in-place upgrade to remove Acronis
If nothing else works and you are at the point of completely reloading your system to remove ATIH 2012, you might try try an in-place upgrade(http://support.microsoft.com/kb/2255099).
An in-place upgrade (also sometimes known as an in-place restore or recovery) does a non-destructive "install" of the OS leaving all of your application and data intact but replaces all system files and settings. It requires a genuine Windows disk.. not one of the manufacturers' destructive reinstallation/recovery disks.
Please note that the in-place upgrade is considered the final step before a full, destructive restore. You will still have to load all updates, hardware drivers and some software, especially software that uses direct hardware access (such as firewalls and anti-virus). It will also reset some of your personalized Windows settings. The good news is that you don't have to restore your data.. or, if I remember right, most of your programs. It should also return control of all low-level functions to Windows.
I should note that I have not used this method to actually remove Acronis, I've just had to use it to remove really nasty viruses (which Acronis is quickly looking like). It has saved me from having to do a complete reload on a number of systems.
Not for this but I did an upgrade fron Vista to Ultermat 7 and the dreded drivers were still there afterwords
Just to clarify, the reason for my in-place upgrade test, was an error message from the task scheduler.; I had already succeeded to remove ATIH. (And the solution to my task scheduler problem I found at technet.microsoft.com.)
I addition, I wanted to tell that the Digital River's ISO files might be handy for those of us with only the recovery disks. IF you run an English Windows-version....
An in place upgrade only repairs Microsoft drivers, system settings and registry, it does not remove installed programs, though with W7 there are some programs that won't work properly afterwards, mainly mail and some social networking sites.
The W7 DVD used must eb the same as the one that installed your system with the exception it isn't guaranteed by Microsoft to work with OEM systems (in fact they say it won't work). Retail OEM DVD's will work, they must be the same language/install type (Home/Pro/Ult) as the installed system and can contain SP1 but not a slipped stream SP1 (I can't work out why a slipstreamed version isn't supposed to work at this moment).
I have said this before and been shouted at, but, many many programs leave their registry entries and drivers on the system after the main program has been uninstalled. Acronis is no different in that (it is the way in theory Windows is supposed to work), however there is no getting away from the fact that the virtual disk driver in 2012 won't lie down easily if it has been grumpy with TIH installed, it will continue to be grumpy after TIH has been uninstalled, rather than benign. This also is not exclusive to Acronis, but is certainly more noticeable due to the fact it can stop the system booting, others just stop programs working when they feel like it.
My advice is, if you are removing 2012 because you either don't like it or it has a failing (other than causing BSOD's), then uninstalling and leaving what's left will be doing your system no more harm than any other software. If though, other programs that have disk access refuse to work, or the BSOD's continue (with driver errors) or a new program that accesses disks refuses to work, then removing the drivers is necessary.
**My flame shields are 3/4 up :) **