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My Dell XPS L502 is shutting down randomly, firstly i thought it was a windows issue as i have upgraded to Windows 10, then while reverting it back to Windows 7 and after removing the windows from laptop i cant reinstall it, as during the boot-loading the laptop is unexpectedly shutting down. it might be the adapter, but im using the original adapter, batter is down so it is used as a desktop, meaning its always connected to a power adapter when in use; i did opened it and closed the laptop and might have in the process damaged some screws as i am getting a light shock when touching the device. Please help me.

Are you getting a slight shock when touching the laptop?? That most certainly shouldn’t happen! Sounds like the power adapter is in a poor state, and if it got much worse you might get a lethal shock! Most Dells use the same power adapter so you might be able to borrow one from another owner, just to try. A replacement shouldn’t be expensive. You should at least get an electrical safety (PAT) test done on the adapter.