Recently I have purchased acer 4820TG laptop for my personal use. It was working absolutely fine till before 2 days. But my laptop isn’t booting now. I have tried booting my laptop with many different operating system but all in vain. Yesterday I was trying to install windows 7 on it, it refused to install on the hard disk. I don’t know why this happened. I used to get an error message like “Windows cannot be installed on this partition” then after this I tried to install ubuntu live cd but nothing happened. A black screen appeared and there was a blinking thing on the left of the screen. I have seen that if I don't insert any disc the just boots up and freeze after the bios screen (there are 3 small squared artifacts in the top left, top middle, and top right of the screen). Can anybody tell me what the problem is?
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