Problems with apps and safari since installing Yosemite
I could have shot myself after installing Maverick when it cam out but after a zillion updates and finally a 100 mile drive to the nearest Apple store and the genius bar it seemed to be working fine. I dreaded installing Yosemite but as I have and iPad mini, and Yosemite is billed to work more harmoniously with that, I did the download. Since then and even following the recent 'update', opening Safari takes forever, I get the rainbow wheel of doom. There is frequently a delay between my typing (about 35 words per minute) and actually seeing the curser and letters on screen, and often webpages just dump. Other times, apps or webpages will just spontaneously pop open. Sometimes Safari can't connect to pages. Not my wifi as if I just choose another page it is fine. I am actually back to using Chrome because I don't seem to have the same problems as with Safari..... go figure. 5 years ago after years of pc's and the frustration of having hardware and software that were specifically made for each other, I thru in the towel and paid the bucks for a MacPro laptop and I loved my first three years. Now, my machine ***** as does Safari!! an Apple app! I feel like I need to debug, but I don't have any thing like MacKeeper on it now (the Genius bar guy took MacKeeper off when I had that visit to solve the Maverick problems). I'm tempted to reinstall it but I read so many posts saying that folks had problems with a virus that they attributed to MacKeeper. So, anyone else having these same problems and can anyone recommend a good cleanup and maintenance software so I can clean this up?
MacBook Pro (15-inch Mid 2010), OS X Yosemite (10.10.2)