It also has caused problems on my system: incorrect file association after registry cleaner, bloatware for meI suggest you to add Sandboxie which will increase your security, as you mentioned that you visit phishing sites.
Along with the above mentioned you can add MBAM, ESET Online Scanner,ZAM ..... etc to your on-demand scanners.
Please rethink on using AVG PC Tuneup, it is not safe to use. It will create more problems than it can solve.