Symantec and Acronis do have trial versions and the Symantec version is for 60-90 days, so plenty of time. However they just released a 2013 version as of this week where we are using the 2010/2011 so it wouldn't be an "apples to apples" comparison.
2013 Version here - Look for TrialWare on the right,requires registration which is free
https://www.symantec.com/system-recoveryDirect link might work here:
https://www4.symantec.com/Vrt/offer?a_id=154587If you have an FTP Tobias I can upload the 2010 and/or 2011 version trial to you. They are all trial versions then you buy a license to make them full, but as a trial they are fully functional. Let me know if I can help with this. If we PM each other for now we could perhaps share results on what we find together to see if Symantec is indeed causing the problem.
Thanks