Firstly I think you've either wasted or been conned out of the money Reg Cure program. The Windows registry does need attention from time to time but I seriously do not recommend anyone to mess about in there, or use third party apps to do this for you. You're relying on the skill of the program coders to tell you what is best for your system. One wrong edit of the registry and you could have a reinstall on your hands at worst, or programs & hardware not working as it should.
Intall the latest version of AVG, which is now at version 8.5. Remove the old version before downloading and installing the latest version. Whilst I recommed AVG over anything else outhere since version 8 they have had some technical issues. I was at a training day with them last week in Newark and put this to them. To be fair they listen and are a very good company. Problem is that with the free version you don't get tech support. Look in your Program Files directory , find the AVG folder and run avgdiag.exe , this will send an error report to AVG. Whilst they may not get back to you they will analyse the fault and fix in future updates.