Help with Freezing/Desktop Manager

Last night my phone ended up freezing seemingly out of nowhere. It kept alternating between a white and black screen with the clock/hour glass symbol.

It eventually died and tonight I've been trying to get it going by connecting it to a wall charger, doing a number of hard resets among other little things.

I've read that maybe I should do reset my BB, so I installed desktop manager on my computer so I can save my info on my BB. I installed the latest program from the website and my phone was not recognized when plugging it in. I then uninstalled that and installed the software that came with my BB, 4.7 I believe. Still nothing. When I go to connect my phone it shows that correct data including my PIN, but when I click OK it won't connect.

I've restarted my computer many times and have done hard resets of my phone through most steps.

Any help is greatly appreciated.

Nobody has had a similar problem?