Are you saying your current system is running successflly, but Acronis backups are only producing corrupt files which you obviously cannot use?
Having used Acronis for some time now, I have never had this happen..... BUT
I always back up onto another HD and wonder if you have a problem burning the backup straight onto a DVD.
Do try this before you remove what most seem to think is a good, reliable, fairly user-friendly program.
If it is the Acronis application you want to be rid of, then Windows add/remove programs should do the trick.
Any Achronis backup files should disappear for ever by simple deletion of each and every.