I download, what I thought was a reputable registry cleaner, made by UniBlue, which in the end, rooted itself into my computer whilst concealing all of its files. I eventually had to hard delete its roots individually, but still couldn't get it all. I remembered this guide and put it to the test. Love all of the software, what one program misses, the others pick up so it's all good. CCleaner is the best imo. The Defraggler takes about 16hrs, though it was my first time.
Thanks again for this, we can kiss later.