Help!! My laptop will get a black screen with mouse at startup when my AC adapter is plugged in!

(Sorry not sure where to post this.)

Hey guys, i really need help with my laptop. Recently, i reinstalled windows 7 cleanly and everything was working fine. Except for the fact that when i chose to shut down, restart, or hibernate, from the computer, it would log off my windows, and all but it would just stop on a black screen with the computer turned on. So i would have to manually hold the power button for it to shut down. (Any idea whats wrong please help) However, everything else was working fine.

(MAIN PROBLEM) Except though, when i unplugged my AC Adapter from the computer for about an hour max, and plugged it back in, my computer froze. So i restarted it, with the charger plugged in, and logged back in, it said that i was running on battery, and that it cannot recognize this AC Adapter, even though its the one dell shipped with my laptop. So i digged through the internet, and tried cleaning out my registry, Power draining, system restore, virus scans, but this only lead to the same problem. Now, my laptop(with charger plugged in) will only get to the windows loading screen,(the one with windows colours forming the flag) and it would just go to a black screen with a mouse in the middle, which i cannot move. It just stays like that forever.

Funny thing is, my laptop will still get charged, when my laptop is turned off and the Charger is plugged in, so my battery will go to 100%. Also, if i don't plug in my charger and start the laptop, it will work perfectly fine(until the battery dies). Everything runs well, except when i plug in my charger, then the screen will just freeze and do nothing, in which i have to hold down the power button to shut it down. I'm pretty sure its not my charger that is faulty, because my friend's m17x can be started and charged fine with my charger. It might have been that i did not install the proper drivers or not all the needed drivers that is causing this problem, however I have no idea what to do. It seems that the only time my laptop isn't working is when my AC adapter is plugged in and my laptop is started.

I have no idea what is wrong. Any help would be greatly appreciated. thanks guys.

 

M17x R2
Genuine Windows® 7 Home Premium, 64bit, English
Intel® Core™ i7 720QM 1.6GHz (2.8 GHz Turbo Mode, 6MB Cache)
1GB GDDR5 ATI Radeon™ Mobility HD 5870
17-inch WideUXGA 1920 x 1200 RGB LED (1200p)
4GB Dual Channel Memory (2x 2GB DDR3)
500GB 7,200RPM SATA-II HDD
Slot-Load Dual Layer DVD Burner (DVD+-RW, CD-RW)
Intel® Ultimate N WiFi Link 6300 a/g/n 3x3 MIMO Technology

 

It seems that when i run it in any 3 of the safe modes, everything seems fine even with the AC adapter plugged in. Maybe its screen resolution?

 

Possibly a graphics driver problem? You could try re-installing them, or using an older/newer version.