I have loaded Windows 7 Ultimate on my Desktop PC. After some time of work I shut it down. Tomorrow when I started the PC, a long stripped signals covered my entire CRT and the whole PC hangs. I have tried to reinstall windows but cannot due to this hanging problem and stripped signals. Where is the problem? Is it hardware or software related issue? I have installed Windows 7 Ultimate on that machine as a pirated and cracked version and without any license activation. Is it for that the problem arising?